Econometrica: Mar 1974, Volume 42, Issue 2

Horizon in a Simple Model of Economic Growth

https://doi.org/0012-9682(197403)42:2<273:HIASMO>2.0.CO;2-D
p. 273-278

Emmett Keeler

In long-run planning, targets may be set further in the future than economic technologies can be estimated. How costly in hindsight is limited foresight? Following Los, we say k is an @e-horizon if knowledge of economic possibilities for the next K time periods permits decisions with results at most @e worse than optimal. For a dynamic Leontief model, we show that any T-period efficient path is almost as big as all feasible T-period paths during the first T - K periods. Thus, given K periods notice, we can plan an @e-optimal growth path no matter how technologies change after T.

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