Pareto-efficient consumption in a pure-exchange, one good economy varies over states of nature with respect to only two factors: real aggregate supply and individual utility shocks. One’s optimal contract receipts vary with respect to only these two factors and the ratio of one’s endowment...

This paper introduces the indexing paradox, which states that it if all investors are rational with rational expectations and have a common risk-averse investment performance measure, then no investor can expect to do better than the market. If the cost of indexing is less than the cost of...

In a pure-exchange economy with one good, stochastic aggregate demand and supply, and consumers having the same relative-risk aversion, Pareto efficiency requires each individual’s consumption to be proportional to aggregate supply. While neither nominal contracts nor pure inflation- indexed...