Date: 2006
Type: Working Paper
Inequality Constraints in Recursive Economies
Working Paper, EUI ECO, 2006/6
RENDAHL, Pontus, Inequality Constraints in Recursive Economies, EUI ECO, 2006/6 - https://hdl.handle.net/1814/4203
Retrieved from Cadmus, EUI Research Repository
Dynamic models with inequality constraints pose a challenging prob-
lem for two major reasons: Dynamic Programming techniques often necessitate a
non established differentiability of the value function, while Euler equation based
techniques have problematic or unknown convergence properties. This paper aims
to resolve these two concerns: An \envelope theorem" is presented that establishes
the differentiability of any element in the convergent sequence of approximate value
functions when inequality constraints may bind. As a corollary, convergence of an
iterative procedure on the Euler equation, usually referred to as time iteration, is
ascertained. This procedure turns out to be very convenient from a computational
perspective; dynamic economic problems with inequality constraints can be solved
reliably and extremely e±ciently by exploiting the theoretical insights provided by
the paper.
Cadmus permanent link: https://hdl.handle.net/1814/4203
ISSN: 1725-6704
Series/Number: EUI ECO; 2006/6
Publisher: European University Institute