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Adjustment Costs, Irreversibility and Investment Patterns in African Manufacturing
This paper examines dynamic patterns of investment in Cameroon, Ghana, Kenya, Zambia and Zimbabwe, assessing the consistency of those patterns with different adjustment cost structures. Using survey data on manufactured firms, we document the importance of zero investment episodes and lumpy investment. The proportion of firms experiencing large investment spikes is significant in explaining aggregate manufacturing investment. Taken together, evidence from descriptive statistics, average investment regressions modeling the response to capital imbalance, and transition data analysis indicate that irreversibility is an important factor considered by firms when making investment plans. The picture is not unanimous however, and some explanations for the mixed results are proposed.
On adjustment costs
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Evaluating Labour Adjustment Costs from Trade Shocks
This paper presents a general equilibrium approach to calculating labour adjustment costs induced by trade policy changes or external sector shocks, which we illustrate by analyzing the adjustment consequences of eliminating quotas and tariffs on U.S. imports. In our approach, factor adjustments in the presence of transactions costs are endogenously determined within the equilibrium structure. The conventional way of calculating such labour adjustment costs is to use full equilibrium models which exclude adjustment costs, and apply exogenous estimates of duration of unemployment to implied intersectoral labour reallocations. By using an equilibrium model in which adjustment costs are absent,...
