Category Archives: Economy

When – and why – did people first start using money?


Sometimes you run across a grimy, tattered dollar bill that seems like it’s been around since the beginning of time. Assuredly it hasn’t, but the history of human beings using cash currency does go back a long time – 40,000 years.

Scientists have tracked exchange and trade through the archaeological record, starting in Upper Paleolithic when groups of hunters traded for the best flint weapons and other tools. First, people bartered, making direct deals between two parties of desirable objects.

Money came a bit later. Its form has evolved over the millennia – from natural objects to coins to paper to digital versions. But whatever the format, human beings have long used currency as a means of exchange, a method of payment, a standard of value, a store of wealth and a unit of account.

As an anthropologist who’s made discoveries of ancient currency in the field, I’m interested in how money evolved in human civilization – and what these archaeological finds can tell us about trade and interaction between far-flung groups.

Why do people need currency?

There are many theories about the origin of money, in part because money has many functions: It facilitates exchange as a measure of value; it brings diverse societies together by enabling gift-giving and reciprocity; it perpetuates social hierarchies; and finally, it is a medium of state power. It’s hard to accurately date interactions involving currency of various kinds, but evidence suggests they emerged from gift exchanges and debt repayments.

Chinese shell money from 3,000 years ago.
PHGCOM, CC BY-SA

Objects that occurred rarely in nature and whose circulation could be efficiently controlled emerged as units of value for interactions and exchange. These included shells such as mother-of-pearl that were widely circulated in the Americas and cowry shells that were used in Africa, Europe, Asia and Australia. Native copper, meteorites or native iron, obsidian, amber, beads, copper, gold, silver and lead ingots have variously served as currency. People even used live animals such as cows until relatively recent times as a form of currency.

The Mesopotamian shekel – the first known form of currency – emerged nearly 5,000 years ago. The earliest known mints date to 650 and 600 B.C. in Asia Minor, where the elites of Lydia and Ionia used stamped silver and gold coins to pay armies.

The discovery of hordes of coins of lead, copper, silver and gold all over the globe suggests that coinage – especially in Europe, Asia and North Africa – was recognized as a medium of commodity money at the beginning of the first millennium A.D. The wide circulation of Roman, Islamic, Indian and Chinese coins points to premodern commerce (1250 B.C. – A.D. 1450).

Coinage as commodity money owes its success largely to its portability, durability, transportability and inherent value. Additionally, political leaders could control the production of coins – from mining, smelting, minting – as well as their circulation and use. Other forms of wealth and money, such as cows, successfully served pastoral societies, but weren’t easy to transport – and of course were susceptible to ecological disasters.

Money soon became an instrument of political control. Taxes could be extracted to support the elite and armies could be raised. However, money could also act as a stabilizing force that fostered nonviolent exchanges of goods, information and services within and between groups.

Medieval English tally sticks recorded transactions and monetary debts.
Winchester City Council Museums, CC BY-SA

Throughout history money has acted as a record, a memory of transactions and interactions. For instance, medieval Europeans widely used tally sticks as evidence for remembering debt.

Follow the money to see the trade routes

In the past, as today, no society was completely self-sustaining, and money allowed people to interact with other groups. People used different forms of currency to mobilize resources, reduce risks and create alliances and friendships in response to specific social and political conditions. The abundance and nearly universal evidence of movement of exotic goods over diverse regions inhabited by people who were independent of each other – from hunter-gatherers to pastoralists, to farmers and city dwellers – points to the significance of currency as a uniting principle. It’s like a common language everyone could speak.

For example, Americans who lived in the Early Formative Period dating from 1450 to 500 B.C. used obsidian, mother-of-pearl shell, iron ore and two kinds of pottery as currency to trade across the Americas in one of the earliest examples of a successful global trade. The Maritime Silk Road trade, which occurred between A.D. 700 to 1450, connected Europeans, Asians and Africans in a global trade that was both transformational and foundational.

Chinese coin from early 1400s found in Kenya by the author.
Chapurukha Kusimba

In my own excavation work in 2012, I recovered a 600-year-old Chinese Yongle Tongbao coin at the ancient Kenyan trade port Manda, in the Indian Ocean. Chinese coins were small disks of copper and silver with a hole in the center so they could be worn on a belt. This coin was issued by Emperor Yongle of the Ming Dynasty. He was interested in political and trade missions to the lands beyond the South China Sea and sent Admiral Zheng He to explore those shores, nearly 80 years before Vasco da Gama reached India from Portugal.

Archaeological discoveries like this one illustrate Africa’s integration into trade interactions in the Indian Ocean. They also show evidence that market economies based on cash money were developing at this time. On the East African coast, there were local merchants and kings of the local Swahili who followed Islam and cultivated these external contacts with other Indian Ocean traders. They wanted to facilitate business dealings, while merchants from the Near East and South Asia had their own Rolodexes of business contacts. Coinage was not just a local affair but also a way of leaving a calling card, a signature and a symbolic token of connections.

As the history of money has shown, currency’s impact is double-edged: It enabled the movement of goods and services, migration and settlement amongst strangers. It brought wealth to some, while hastening the development of socioeconomic and other distinctions. The same patterns unfold today with the modern relationship between China and Africa, now more intertwined and unequal than when Admiral Zheng He first brought coins from China in a diplomatic gesture, as a symbolic extension of friendship across the distance separating the two.

The ConversationIn our time, possession of cash currency differentiates the rich from the poor, the developed from the developing, the global north from the emerging global south. Money is both personal and impersonal and global inequality today is linked to the formalization of money as a measure of societal well-being and sustainability. Even as currency continues to evolve in our digital age, its uses today would still be familiar to our ancient predecessors.

Chapurukha Kusimba, Professor of Anthropology, American University

This article was originally published on The Conversation. Read the original article.

Police around the world learn to fight global-scale cybercrime


Frank J. Cilluffo, George Washington University; Alec Nadeau, George Washington University, and Rob Wainwright, University of Exeter

From 2009 to 2016, a cybercrime network called Avalanche grew into one of the world’s most sophisticated criminal syndicates. It resembled an international conglomerate, staffed by corporate executives, advertising salespeople and customer service representatives. The Conversation

Its business, though, was not standard international trade. Avalanche provided a hacker’s delight of a one-stop shop for all kinds of cybercrime to criminals without their own technical expertise but with the motivation and ingenuity to perpetrate a scam. At the height of its activity, the Avalanche group had hijacked hundreds of thousands of computer systems in homes and businesses around the world, using them to send more than a million criminally motivated emails per week.

Our study of Avalanche, and of the groundbreaking law enforcement effort that ultimately took it down in December 2016, gives us a look at how the cybercriminal underground will operate in the future, and how police around the world must cooperate to fight back.

Cybercrime at scale

Successful cybercriminal enterprises need strong and reliable technology, but what increasingly separates the big players from the smaller nuisances is business acumen. Underground markets, forums and message systems, often hosted on the deep web, have created a service-based economy of cybercrime.

Just as regular businesses can hire online services – buying Google products to handle their email, spreadsheets and document sharing, and hosting websites on Amazon with payments handled by PayPal – cybercriminals can do the same. Sometimes these criminals use legitimate service platforms like PayPal in addition to others specifically designed for illicit marketplaces.

And just as the legal cloud-computing giants aim to efficiently offer products of broad use to a wide customer base, criminal computing services do the same. They pursue technological capabilities that a wide range of customers want to use more easily. Today, with an internet connection and some currency (bitcoin preferred), almost anyone can buy and sell narcotics online, purchase hacking services or rent botnets to cripple competitors and spread money-making malware.

The Avalanche network excelled at this, selling technically advanced products to its customers while using sophisticated techniques to evade detection and identification as the source by law enforcement. Avalanche offered, in business terms, “cybercrime as a service,” supporting a broad digital underground economy. By leaving to others the design and execution of innovative ways to use them, Avalanche and its criminal customers efficiently split the work of planning, executing and developing the technology for advanced cybercrime scams.

With Avalanche, renters – or the network’s operators themselves – could communicate with, and take control of, some or all of the hijacked computers to conduct a wide range of cyberattacks. The criminals could then, for example, knock websites offline for hours or longer. That in turn could let them extract ransom payments, disrupt online transactions to hurt a business’ bottom line or distract victims while accomplices employed stealthier methods to steal customer data or financial information. The Avalanche group also sold access to 20 unique types of malicious software. Criminal operations facilitated by Avalanche cost businesses, governments and individuals around the world hundreds of millions of dollars.

Low risk, high reward

To date, cybercrime has offered high profits – like the US$1 billion annual ransomware market – with low risk. Cybercriminals often use technical means to obscure their identities and locations, making it challenging for law enforcement to effectively pursue them.

That makes cybercrime very attractive to traditional criminals. With a lower technological bar, huge amounts of money, manpower and real-world connections have come flooding into the cybercrime ecosystem. For instance, in 2014, cybercriminals hacked into major financial firms to get information about specific companies’ stocks and to steal investors’ personal information. They first bought stock in certain companies, then sent false email advertisements to specific investors, with the goal of artificially inflating those companies’ stock prices. It worked: Stock prices went up, and the criminals sold their holdings, raking in profits they could use for their next scam.

In addition, the internet allows criminal operations to function across geographic boundaries and legal jurisdictions in ways that are simply impractical in the physical world. Criminals in the real world must be at a crime’s actual site and may leave physical evidence behind – like fingerprints on a bank vault or records of traveling to and from the place the crime occurred. In cyberspace, a criminal in Belarus can hack into a vulnerable server in Hungary to remotely direct distributed operations against victims in South America without ever setting foot below the Equator.

A path forward

All these factors present significant challenges for police, who must also contend with limited budgets and manpower with which to conduct complex investigations, the technical challenges of following sophisticated hackers through the internet and the need to work with officials in other countries.

The multinational cooperation involved in successfully taking down the Avalanche network can be a model for future efforts in fighting digital crime. Coordinated by Europol, the European Union’s police agency, the plan takes inspiration from the sharing economy.

Uber owns very few cars and Airbnb has no property; they help connect drivers and homeowners with customers who need transportation or lodging. Similarly, while Europol has no direct policing powers or unique intelligence, it can connect law enforcement agencies across the continent. This “uberization” of law enforcement was crucial to synchronizing the coordinated action that seized, blocked and redirected traffic for more than 800,000 domains across 30 countries.

Through those partnerships, various national police agencies were able to collect pieces of information from their own jurisdictions and send it, through Europol, to German authorities, who took the lead on the investigation. Analyzing all of that collected data revealed the identity of the suspects and untangled its complex network of servers and software. The nonprofit Shadowserver Foundation and others assisted with the actual takedown of the server infrastructure, while anti-virus companies helped victims clean up their computers.

Using the network against the criminals

Police are increasingly learning – often from private sector experts – how to detect and stop criminals’ online activities. Avalanche’s complex technological setup lent itself to a technique called “sinkholing,” in which malicious internet traffic is sent into the electronic equivalent of a bottomless pit. When a hijacked computer tried to contact its controller, the police-run sinkhole captured that message and prevented it from reaching the actual central controller. Without control, the infected computer couldn’t do anything nefarious.

However, interrupting the technological systems isn’t enough, unless police are able to stop the criminals too. Three times since 2010, police tried to take down the Kelihos botnet. But each time the person behind it escaped and was able to resume criminal activities using more resilient infrastructure. In early April, however, the FBI was able to arrest Peter Levashov, allegedly its longtime operator, while on a family vacation in Spain.

The effort to take down Avalanche also resulted in the arrests of five people who allegedly ran the organization. Their removal from action likely led to a temporary disruption in the broader global cybercrime environment. It forced the criminals who were Avalanche’s customers to stop and regroup, and may offer police additional intelligence, depending on what investigators can convince the people arrested to reveal.

The Avalanche network was just the beginning of the challenges law enforcement will face when it comes to combating international cybercrime. To keep their enterprises alive, the criminals will share their experiences and learn from the past. Police agencies around the world must do the same to keep up.

Frank J. Cilluffo, Director, Center for Cyber and Homeland Security, George Washington University; Alec Nadeau, Presidential Administrative Fellow, Center for Cyber and Homeland Security, George Washington University, and Rob Wainwright, Director of Europol; Honorary Fellow, Strategy and Security Institute, University of Exeter

Now that bitcoins are worth more than their weight in gold, is it time for central banks to make their own?


The history of gold trading can be traced back hundreds of years while bitcoin, a digital currency that uses encryption and works independently of central banks, has been around for less than ten. The Conversation

But the cryptocurrency is now starting to challenge gold as the investment of choice. Its meteoric rise is such that on March 3 2017, bitcoin overtook gold for the first time, trading at US$1,290 compared to US$1,228 for an ounce of gold.

All the gold that has ever been mined would easily fit under the legs of the Eiffel Tower – in fact, multiple times. Gold’s scarcity is one reason for its value. Another reason is that it’s a very nonreactive metal so it doesn’t tarnish, which is important if you’ve invested millions and don’t want it to slowly deteriorate.

Most governments keep some of their funds in gold (as the video below explains). But although gold is seen as a safe haven in times of crisis, it is still subject to the usual market fluctuations of any commodity. Once the bitcoin reaches its full potential (all bitcoins are mined) the value will be much more stable.

How much gold is there and why is it a good investment?

What is bitcoin?

Bitcoin is a virtual currency used for electronic purchases and transfers. It has recently been gaining popularity and a growing number of businesses, including WordPress, Overstock.com, and Reddit, now accept it as a form of payment. Microsoft already accepts bitcoin payments through its Windows 10 and Windows 10 Mobile platforms, while those shopping online at Shopify may use bitcoin as payment.

Bitcoin is also moving outside the virtual space; what may be the world’s first bitcoin store, House of Nakamoto, opened early this year in Vienna. There, people can buy bitcoins for euros, and vice versa, from a dedicated bitcoin ATM. Drinkers in Cambridge can pay for beers at a pub called The Haymakers.

The number of bitcoins is capped at 21 million. As of March 2017, there were almost 16.2 million circulating. The supply of coins grows steadily because of the way bitcoin is programmed. Each “miner” (“mining” is lingo for the discovery of new bitcoins – anyone with computer knowledge and access to blockchain software can act as a miner) introduces new coins to the supply at a rate of around 12.5 coins every ten minutes.

Mining is the process of adding transaction records to bitcoin’s public ledger of past transactions (blockchain). The blockchain confirms transactions as having taken place to the rest of the network.

Even as far back as 2013, bitcoin was worth almost as much as gold. And, at the end of 2016, the total value of bitcoins in circulation was US$14bn.

A good investment opportunity?

Investment in digital currencies, such as bitcoin, has emerged as an alternative to traditional forms of money and created a niche that’s driving major innovations in the financial sector, such as peer-to-peer lending, and digital wallets. As traders gain confidence in alternative forms of money and payment mechanisms, bitcoin is seen as a possible investment alternative.

In fact, bitcoin exhibits similar features to gold – limited global supply, maintaining value and hedging against global market volatility. Such is the exuberance in bitcoin investment that it actually outperforms the precious metal, generating an annual return of 155% compared to gold’s annual loss of 6% during the same time period.

Even though Bitcoin seems a profitable investment tool, its value can be as volatile as the value of the gold, depending on the perceived risk of owning bitcoin as a commodity. Bitcoins are encrypted for security purposes, but while the coding identifies the currency itself, it does not identify its owner. If someone hacks the miner system and gets a secret bitcoin code they will eventually become the rightful owner.

What, then, is pushing the investment value of bitcoin? One driver is increasing demand from developing countries, especially Brazil, Russia, India, China, and South Africa. These countries are experiencing economic distress and weakening currencies, making their local currencies unpredictable and volatile. As a result, it’s becoming increasingly popular to use bitcoin as a natural hedge against paper currency.

Another contributing factor to the rise of bitcoin is the possibility of a trade war between US and China. US President Donald Trump has indicated that he may impose 45% tariff on Chinese imports. This may lead to a weakening yuan, and capital outflow from China as investors will resort to more stable currencies such as euros.

The hike in bitcoin’s price during financial troubles is also a testament to its increasing attraction as a hedging tool.

When Cyprus’s economy crashed in 2013, the price of bitcoins spiked as people resorted to other forms of payment than the national currency. In 2015, when the Chinese currency was in free fall, people in the country turned to bitcoin alongside gold.

And after the Brexit vote in the UK, when global currencies and stock markets tanked, bitcoin’s value rose more than US$100 compared to the previous day. This was mainly due to some of the speculative money flowing out of the pound and yuan making its way to bitcoin.

Increased government support

Bitcoin is not just getting increased interest from tech-savvy individuals and banks such as Barclays, BBVA, Commonwealth Bank of Australia, Credit Suisse, JP Morgan, State Street, Royal Bank of Scotland and UBS. Governments are also lending support to the cryptocurrency.

The Australian government plans to reduce tax on bitcoin transactions. Current treatment of the digital currency under the goods and services tax (GST) law means that consumers are “double taxed” when using it to buy anything already subject to GST. The government plans to change this.

Meanwhile, the UK’s chief scientific adviser has said that governments should use bitcoin’s underlying technology – blockchains – to help with taxes, benefits and passports.

Taking its cue from bitcoin, the US government is planning to launch a legalised cryptocurency called Fedcoin, which can be exchanged for a physical dollar. Bitcoin is not considered legal tender because it is not backed by any government.

Bitcoin pricing is also motivating the much anticipated establishment of the first bitcoin exchange-traded fund (ETF) in the United States. An ETF is an investment company that has no restrictions on the amount of shares it can issue.

The approval of a bitcoin ETF would make the cryptocurrency more attractive to risk-averse institutional investors as it would allow an easier way to gain access to bitcoin than buying it directly.

Such is the dominance of bitcoin that the Bank of England issued a white paper on the subject, investigating the possibility of central banks minting their own cryptocurrencies.

Bitcoin’s appeal, compared to gold, comes from two factors. First, it can be used as a easy medium for payments (for a limited but growing number of transactions), which gold cannot replicate. And with their limited supply of 21 million, bitcoins are likely to attract higher demand compared to gold.

The debate over the supremacy of gold versus bitcoin will continue. What we can say with certainty is that we cannot use gold to buy bitcoin directly but bitcoin can be used to buy gold. You can decide which you prefer.

Nafis Alam, Professor of Finance, Sunway University and Graham Kendall, Professor of Computer Science and Provost/CEO/PVC, University of Nottingham

This article was originally published on The Conversation. Read the original article.

The blockchain could help advertisers lock up our attention


Eric T.K. Lim, UNSW and Chee-Wee Tan, Copenhagen Business School

The tech revolution is coming to advertising. Chatbots are replacing humans, big data threatens our privacy, and the blockchain is linking it all together. In our series on tech and advertising, we’re taking a look at how the industry is being reshaped. The Conversation


While technology has been making more devices “smart”, and we carry phones with all sorts of sensors, these haven’t yet been systematically applied to advertising’s central problem – engagement. The blockchain, however, will make advertising much smarter.

Traditional advertising – think of posters on bus stops and TV commercials – is easy to ignore and its effectiveness is hard to measure. Even online advertising has problems measuring engagement. But with the blockchain, advertisers will be able to tap into the data in our devices, automatically pull together multiple sources of information, and even offer rewards to consumers.

What is the blockchain again?

Think of the blockchain as a kind of a public spreadsheet. This spreadsheet is stored simultaneously on a bunch of different computers and is encrypted.

When someone transfers a Bitcoin (or anything else you’re trading on the blockchain) the transaction is verified by all of the computers, encrypted and added to the spreadsheet, where everyone can see. The encryption and transparency are what make the system secure.

Bitcoin and other cryptocurrencies, such as Ripple XRP and Ether, sit on top of the blockchain. They can be used as currencies, transferred between people just like normal money. Or they can be used as a kind of token, the transfer recorded to signify when something has been exchanged.

A computer program known as a smart contract has evolved out of this system. It can execute specific actions when predefined conditions within the blockchain are fulfilled – such as automatically paying a farmer when crops are delivered. But smart contracts could also have huge implications for advertising.

Advertising is going to be more complex

Advertising in the age of blockchains and smart contracts will be something more like an ecosystem. Information and value will flow and be captured in numerous directions. Using smart contracts, many different entities and data streams will be brought together.

Let’s imagine Jane sees an advertisement for a pair of shoes on her smartphone. The advertiser asks that, in exchange for Bitcoin, she reveal her identity by turning on her camera and taking a selfie. She must also allow the advertiser to access her SIM and verify with the phone company that it is indeed Jane who owns the phone. The advertiser would also like to know where Jane is located using the Google Maps application on her phone.

Individually, none of these actions are new. What will be new is having a smart contract to tie it all together.

At the initiation of this advertising effort, the parties involved in the smart contract are Jane, the advertiser, the phone company and Google. A predefined reward (in the form of Bitcoin) promised by the advertiser will be released to Jane only once all parties fulfil their part of the contract. Jane must take a selfie and send it to the advertiser, the phone company must confirm with the advertiser that Jane indeed owns the phone used to take the selfie and Google must release Jane’s location to the advertiser.

There are a few implications from this example.

Consumers like Jane will now be empowered to choose whether they want to give up their privacy in exchange for something. Jane could choose to block Google Maps from revealing her location, for example.

Advertisers will know exactly how consumers interact with their ads. By specifying actions for Jane to perform, like taking a selfie after watching an ad, advertisers will overcome the crucial problem of not being able to verify whether people are actually paying attention.

They will also know whether consumers have adhered to every part of the agreement. If Jane does not allow Google Maps to reveal her location, the advertiser will be aware of this and may release only some of her reward. This is an efficient and cost-effective method of piecing together the profiles of customers.

Finally, the blockchain will enable advertisers to capture value they could not previously, because they could not track or measure interaction with ads.

For example, let’s say the advertiser’s request is more ambitious, and Jane decides to reveal she is using a cab from company X and dropping by cafe Y to pick up a latte before going to the shoe store. The original advertisement has now generated value not only for the advertiser but also for those other entities.

Using the blockchain means all parties will have access to information about what happened. The advertiser could collaborate with other companies like cab company X and cafe Y to boost business. They could even demand those companies chip in to cover the costs.

A few years off

At this point we must go through a reality check.

While some parts of this picture are already being experimented with – Nasdaq has built a marketplace to buy and sell advertising on a blockchain, and others are building the tokens to sit on top – technologically and politically we are still sorely lacking.

There are also many digital blind spots that, like missing links among security cameras, allow some actions to go unobserved and unaccounted for during the advertising process.

But it is possible that in the future, once the infrastructure and our societies have caught up, every digital device will be connected to a blockchain-like system so that all digital actions are accounted for. When that happens, advertisers won’t know what hit them.

Eric T.K. Lim, Senior Lecturer in Information Systems, UNSW and Chee-Wee Tan, Professor in IT Management, Copenhagen Business School