Estimating Flexible Functional Forms using Macroeconomic Data

Chihiro Shimizu, Walter Diewert and Koji Nomura

No e206, Working Papers from Tokyo Center for Economic Research

Abstract: The paper estimates a flexible functional form for a joint cost function using US aggregate data for the years 1970-2022. There are four outputs (consumption, government, investment and exports) and six inputs (imports, labour, machinery and equipment services, structure services, other capital services and land services). Curvature conditions on the joint cost function are imposed without destroying the flexibility of the functional form. Various elasticities of supply and demand are estimated along with technical progress bias terms for each input. When using aggregate time series data based on the System of National Accounts, the paper shows that it is probably better to estimate a joint cost function rather than a gross output function or a GDP function. The paper also shows that assuming that an aggregate production function has constant elasticities of substitution is not appropriate for the US. Finally, the importance of including land as an aggregate input is stressed.

Pages: 76 pages
Date: 2024-04
New Economics Papers: this item is included in nep-eff
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