It’s hard to answer that without actually seeing a modern gift economy in action. Luckily, modern gift economies actually do exist. On a small scale, they exist among friends, who might lend each other a vacuum or a cup of flour. There’s even an example of a gift economy on a much larger scale, albeit one that’s not always in operation: The Rainbow Gathering, an annual festival in which about 10,000 people gather for a month in the woods (it rotates among various national forests around the country each year) and agree not to bring any money. Groups of attendees set up “kitchens,” in which they prepare and serve food for thousands of people every day, all for free. Classical economists might guess that people would take advantage of such a system, but, sure enough, everyone is fed, and the people who don’t cook play music, set up trails, teach classes, gather firewood, and perform in plays, among other things.
This sort of scenario was so undesirable that societies must have created money to facilitate trade, argues Smith. Aristotle had similar ideas, and they’re by now a fixture in just about every introductory economics textbook. “In simple, early economies, people engaged in barter,” reads one. (“The American Indian with a pony to dispose of had to wait until he met another Indian who wanted a pony and at the same time was able and willing to give for it a blanket or other commodity that he himself desired,” read an earlier one.)
For example, the market for national security payloads and NASA missions (James Webb is a notable exception, bartered between NASA and ESA) are typically closed to Arianespace. — Eric Berger, Ars Technica, "As the SpaceX steamroller surges, European rocket industry vows to resist," 20 July 2018 Friends told the British press that Rowley would often search dumpsters for items to barter or sell. — William Booth, Anchorage Daily News, "Woman exposed to nerve agent in southern England dies; police launch murder investigation," 9 July 2018 Anyone who unlawfully captures or kills a big game animal and then sells or barters the animal is guilty of a felony. — Dustin Gardiner, azcentral, "10 Arizona laws that actually exist: Private armies, food-wasting ban, windshield repairs," 27 June 2018 This early depiction suggests that although chocolate was being bartered at this point, it may not have been traded as a form of currency, Baron says. — Joshua Rapp Learn, Science | AAAS, "The Maya civilization used chocolate as money," 27 June 2018 To generate publicity, the cash is handed out at ceremonies held in the weekly roadside markets where villagers gather to barter meager fish hauls for goods like plastic buckets or quart bottles of gasoline. — New York Times, "Nearly Eradicated in Humans, the Guinea Worm Finds New Victims: Dogs," 18 June 2018 Prize is not transferable or redeemable for cash and may not be sold, bartered or auctioned. — Union-tribune Rewards, sandiegouniontribune.com, "Enter to Win Two Tickets to San Diego Legion's Inaugural Rugby Season as well as a gift certificate to Hundred Proof!," 11 May 2018 Others report punishment for having hoarded, rationed or bartered for menstrual products. — refinery29.com, "Meghan Markle Has Championed Menstrual Equity — Here's Why You Should Too," 21 May 2018 As the city bartered for water with local farmers and hustled to build desalination plants, its residents simply started using less water. — Ryan Lenora Brown, The Christian Science Monitor, "Squeezing more out of taps: How Cape Town cut consumption in half," 30 Apr. 2018

Barter-based economies are one of the earliest, predating monetary systems and even recorded history. People can successfully use barter in many almost any field. Informally, people often participate in barter and other reciprocal systems without really ever thinking about it as such -- for example, providing web design or tech support for a farmer or baker and receiving vegetables or baked goods in return. Strictly Internet-based exchanges are common as well, for example exchanging content creation for research.
Even before visiting the Marquesas, I had heard from men who had touched at the group on former voyages some revolting stories in connection with these savages; and fresh in my remembrance was the adventure of the master of the Katherine, who only a few months previous, imprudently venturing into this bay in an armed boat for the purpose of barter, was seized by the natives, carried back a little distance into their valley, and was only saved from a cruel death by the intervention of a young girl, who facilitated his escape by night along the beach to Nukuheva.
Bartering allows individuals to trade items that they already have but are not using for items that they need while keeping their cash on hand for expenses that cannot be paid through bartering such as a mortgage, medical bills and utilities. Bartering can also have a psychological benefit because it can create a deeper personal relationship between trading partners than a typical monetized transaction. Bartering can also help people build professional networks and market their businesses.
Other anthropologists have questioned whether barter is typically between "total" strangers, a form of barter known as "silent trade". Silent trade, also called silent barter, dumb barter ("dumb" here used in its old meaning of "mute"), or depot trade, is a method by which traders who cannot speak each other's language can trade without talking. However, Benjamin Orlove has shown that while barter occurs through "silent trade" (between strangers), it also occurs in commercial markets as well. "Because barter is a difficult way of conducting trade, it will occur only where there are strong institutional constraints on the use of money or where the barter symbolically denotes a special social relationship and is used in well-defined conditions. To sum up, multipurpose money in markets is like lubrication for machines - necessary for the most efficient function, but not necessary for the existence of the market itself."[12]
Companies may want to barter their products for other products because they do not have the credit or cash to buy those goods. It is an efficient way to trade because the risks of foreign exchange are eliminated. The most common contemporary example of business-to-business barter transactions is an exchange of advertising time or space; it is typical for smaller firms to trade the rights to advertise on each others' business spaces. Bartering also occurs among companies and individuals. For example, an accounting firm can provide an accounting report for an electrician in exchange for having its offices rewired by the electrician.
It’s hard to answer that without actually seeing a modern gift economy in action. Luckily, modern gift economies actually do exist. On a small scale, they exist among friends, who might lend each other a vacuum or a cup of flour. There’s even an example of a gift economy on a much larger scale, albeit one that’s not always in operation: The Rainbow Gathering, an annual festival in which about 10,000 people gather for a month in the woods (it rotates among various national forests around the country each year) and agree not to bring any money. Groups of attendees set up “kitchens,” in which they prepare and serve food for thousands of people every day, all for free. Classical economists might guess that people would take advantage of such a system, but, sure enough, everyone is fed, and the people who don’t cook play music, set up trails, teach classes, gather firewood, and perform in plays, among other things.
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