TY - JOUR PB - Taylor&Francis JF - Journal of Dynamical Systems and Geometric Theories IS - 2 SN - 1726-037X N2 - Abstract Suboptimal solutions to infinite-horizon dynamic optimization problems with continuous state are considered. An underlying dynamical system determining the state transition between each stage and the next one is modelled via the constraints (xt, xt +1) ? D, t = 0, 1, ?, where X is the set to which the state vector belongs and D ? X × X is a correspondence. An error analysis is performed for two cases: approximation of the value function and approximation of the optimal policy function. Structural properties of the dynamic optimization problems are derived, allowing to restrict a priori the approximation to families of functions characterized by certain smoothness properties. The two approximation approaches are compared and the respective pros and cons are highlighted. EP - 147 ID - eprints1702 VL - 6 Y1 - 2008/// A1 - Gnecco, Giorgio A1 - Sanguineti, Marcello UR - http://www.tandfonline.com/doi/abs/10.1080/1726037X.2008.10698552 KW - Dynamic optimization KW - Dynamic programming KW - Infinite horizon KW - Approximation schemes KW - Suboptimal solutions AV - none SP - 123 TI - Value and Policy Function Approximations in Infinite-Horizon Optimization Problems ER -