The model analyzed here constrains most work on the main job to be full time. Partial retirement requires a job change and a wage reduction.Estimates of utility function parameters and their distributions incorporate information on age of leaving the main job and of full retirement. These estimates determine the slope at different ages and the convexity of within period indifference curves between compensation and leisure. Even though age specific dummy variables are not used, the model closely tracks retirement behavior. Policy analysis based on earlier models with simpler structures is shown to be misleading.

[This paper develops a model of labor supply for married women which takes into account both the joint decision on participation and hours, and the nonlinear shape of the budget constraint due to taxation. The model can explain the absence of observations of the tax kink by assuming the existence of optimization errors in addition to errors capturing taste variation. The estimates of the model, which are obtained with British micro data, suggest that the overall wage elasticity is about 2 and that participation is more responsive to wages than hours of work.]

This papjer proposes alternatives to maximum likelihood estimation of the censored and truncated regression models (known to economists as "Tobit" models) .The proposed estimators are based on symmetric censoring or truncation of the upper tail of the distribution of the dependent variable.Unlike methods based on the assumption of identically distributed Gaussian errors/ the estimators are consistent and asymptotically normal for a wide class of error distributions and for heteroscedasticity of unknown form.The paper gives the regularity conditions and proofs of these large sample results, demonstrates how to construct consistent estimators of the asymptotic covariance matrices, and presents the results of a simulation study for the censored case.Extensions and limitations of the approach are also considered.

On considere differents aspects de la conception et de l'analyse. On compare des facons alternatives d'observer des individus en temps discret via la matrice d'information de Fisher