Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Abstract Recent theoretical developments relating to investment under uncertainty have highlighted the importance of irreversibility for the timing of investment expenditures and their expected returns. This has subsequently stimulated a growing empirical literature which examines uncertainty and threshold effects on investment behaviour. This paper presents a review of this literature. A variety of methods have been used to investigate the empirical implication of irreversibility in investment, the majority focusing on the relationship between investment flows and proxy measures of uncertainty. A general conclusion is that increased uncertainty, at both aggregate and disaggregate levels, leads to lower investment rates. This suggests that there is an irreversibility effect, under which greater uncertainty raises the value of the "option" to delay a commitment to investment. This effect appears to dominate any positive impact on investment arising from the fact that greater uncertainty, under certain circumstances, increases the marginal profitability of capital. The methods used raise a number of issues which call into question the reliability of the findings, and these are addressed in the paper. However, if such irreversibility effects are present, then their omission from traditional investment models casts doubt on the efficacy of such specifications. JEL Classification: D81, D92, E22
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JEL classification codes E24, E32This paper develops an efficiency-wage model where input prices affect the equilibrium rate of unemployment. We show that a simple framework based on only two prices (the real price of oil and the real rate of interest) is able to explain the main post-war movements in the rate of U.S.joblessness. The equations do well in forecasting unemployment many years out-of-sample, and provide evidence that the oil-price spike associated with Iraq's invasion of Kuwait appears to be a component of the "mystery" recession which followed.
This article examines whether subjective expectations of unemployment are reliable indicators of the probability of becoming unemployed and investigates their association with wage growth. We find that workers' fears of unemployment are increased by their previous unemployment experience and by the unemployment experiences of a close friend, and are associated with other objective indicators of insecure jobs. We then show that unemployment fear predicts future unemployment, above and beyond observed objective variables. High fears of unemployment are found to be associated with significantly lower levels of wage growth for men, but to have no significant link with wage growth for women. Copyright 2007 The Author(s). Journal compilation Royal Economic Society 2007.
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