NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Investment Options and the Business Cycle

Boyan Jovanovic

NBER Working Paper No. 13307
Issued in August 2007
NBER Program(s):   PR   EFG

This paper extends Lucas (1978) to a production economy with two capital goods. It is an RBC model in which each unit of investment requires a new idea, an "option". When options are scarce, new capital is harder to put in place and the value of old capital rises. Thus the stock market and Tobin's Q are negative indexes of intangibles. During a boom, Q rises gradually, as options are used up. Because investment represents an exercise of options, it has an intertemporal substitution tradeoff that is absent in the adjustment-cost model. Equilibrium may be efficient even without markets for knowledge; the stock market may suffice.

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Document Object Identifier (DOI): 10.3386/w13307

Published: Jovanovic, Boyan, 2009. "Investment options and the business cycle," Journal of Economic Theory, Elsevier, vol. 144(6), pages 2247-2265, November. citation courtesy of

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