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Abbring, Jaap H. (contributor); … - 2008

Persistent link: https://www.econbiz.de/10003637508

L1-Penalised quantile regression in high-dimensional sparse models

Belloni, Alexandre; Chernozhukov, Victor - 2009

We consider median regression and, more generally, quantile regression in high-dimensional sparse models. In these models the overall number of regressors p is very large, possibly larger than the sample size n, but only s of these regressors have non-zero impact on the conditional quantile of...

Persistent link: https://www.econbiz.de/10003838974

Set identification with Tobin regressors

Chernozhukov, Victor; Rigobón, Roberto; Stoker, Thomas … - 2009

We give semiparametric identification and estimation results for econometric models with a regressor that is endogenous, bound censored and selected, called a Tobin regressor. First, we show that true parameter value is set identified and characterize the identification sets. Second, we propose...

Persistent link: https://www.econbiz.de/10003838979

Quantile and average effects in nonseparable panel models

Chernozhukov, Victor; Fernández-Val, Iván; Newey, … - 2009

This paper gives identification and estimation results for quantile and average effects in nonseparable panel models, when the distribution of period specific disturbances does not vary over time. Bounds are given for interesting effects with discrete regressors that are strictly exogenous or...

Persistent link: https://www.econbiz.de/10003899091

Evaluating marginal policy changes and the average effect of treatment for individuals at the margin

Carneiro, Pedro; Heckman, James J.; Vytlacil, Edward - 2009

This paper develops methods for evaluating marginal policy changes. We characterize how the effects of marginal policy changes depend on the direction of the policy change, and show that marginal policy effects are fundamentally easier to identify and to estimate than conventional treatment...

Persistent link: https://www.econbiz.de/10003869267

Quantile and probability curves without crossing

Chernozhukov, Victor (contributor); … - 2007

Persistent link: https://www.econbiz.de/10003454059

Sparse models and methods for optimal instruments with an application to eminent domain

Belloni, A.; Chen, D.; Chernozhukov, Victor; Hansen, … - 2010

sample size, n. We rigorously develop asymptotic distribution and inference theory for the resulting IV estimators and … functions which are of independent theoretical and practical interest. Specifically, we develop the asymptotic theory for these … innovatively using moderate deviation theory for self-normalized sums, we provide convergence rates for these estimators that are …

Persistent link: https://www.econbiz.de/10008695561

Estimating the technology of cognitive and noncognitive skill formation

Cunha, Flávio; Heckman, James J.; Schennach, Susanne M. - 2010

This paper formulates and estimates multistage production functions for children's cognitive and noncognitive skills. Skills are determined by parental environments and investments at different stages of childhood. We estimate the elasticity of substitution between investments in one period and...

Persistent link: https://www.econbiz.de/10003989930

Testing the correlated random coefficient model

Heckman, James J.; Schmierer, Daniel; Urzua, Sergio - 2010

The recent literature on instrumental variables (IV) features models in which agents sort into treatment status on the basis of gains from treatment as well as on baselinepretreatment levels. Components of the gains known to the agents and acted on by them may not be known by the observing...

Persistent link: https://www.econbiz.de/10003989944

Post-l1-penalized estimators in high-dimensional linear regression models

Belloni, Alexandre; Chernozhukov, Victor - 2010

In this paper we study post-penalized estimators which apply ordinary, unpenalized linear regression to the model selected by first-step penalized estimators, typically LASSO. It is well known that LASSO can estimate the regression function at nearly the oracle rate, and is thus hard to improve...

Persistent link: https://www.econbiz.de/10003989968