A movement along the demand curve for automobiles is caused by a change in:

When Congress passed a law that imposed a tax designed to fund its Social Security and Medicare programs it wanted employers and workers to share the burden of the tax equally

Most economists who have studied the incidence of the tax have concluded A) the tax rate should be greater for high-income workers than for low-income workers. B) the burden of the tax falls almost entirely on workers. C) the tax is not high enough to cover the future costs of Social Security and Medicare. D) the tax on employers is too high because it reduces the employment of low-skilled workers.

Relative to 1800, today in the world there are:

A. more people but lower per-capita consumption. B. more people but the same per-capita consumption. C. more people and higher per-capita consumption. D. the same number of people but higher per-capita consumption.