What is the double coincidence of wants and why is it a barrier to barter?

What is the double coincidence of wants and why is it a barrier to barter?

• A. It is when each party must want what the other offers; barrier because matches are rare, increasing costs.
• B. It is the expectation that money be used in every trade; barrier due to inflation.
• C. It means both buyers and sellers must be in the same location; barrier due to distance.
• D. It refers to a third party mediator; barrier due to fees.

Answer: (A)

The main idea is the double coincidence of wants: in barter, you can only trade if you want what the other person has and they want what you have. Since there’s no money to act as a common medium, trades only succeed when two parties’ desires line up perfectly at the same time. That makes exchanges slow and scarce because finding that mutual match is often difficult, costly, and time-consuming. This is why barter is inefficient— transaction costs rise and opportunities to trade shrink. The other options miss the core point: requiring money in every trade isn’t what creates the barrier, inflation isn’t the fundamental issue described, location alone doesn’t capture the mutual desire requirement, and a third-party mediator isn’t part of the barter problem.

The main idea is the double coincidence of wants: in barter, you can only trade if you want what the other person has and they want what you have. Since there’s no money to act as a common medium, trades only succeed when two parties’ desires line up perfectly at the same time. That makes exchanges slow and scarce because finding that mutual match is often difficult, costly, and time-consuming. This is why barter is inefficient— transaction costs rise and opportunities to trade shrink.

The other options miss the core point: requiring money in every trade isn’t what creates the barrier, inflation isn’t the fundamental issue described, location alone doesn’t capture the mutual desire requirement, and a third-party mediator isn’t part of the barter problem.