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Testing for Nonparametric Identification of Causal Effects in the Presence of a Quasi-Instrument

de Luna, Xavier; Johansson, Per - Institute for the Study of Labor (IZA) - 2012

The identification of average causal effects of a treatment in observational studies is typically based either on the unconfoundedness assumption or on the availability of an instrument. When available, instruments may also be used to test for the unconfoundedness assumption (exogeneity of the...

Persistent link: https://www.econbiz.de/10010990937

When the Cat Is Near, the Mice Won't Play: The Effect of External Examiners in Italian Schools

Bertoni, Marco; Brunello, Giorgio; Rocco, Lorenzo - Institute for the Study of Labor (IZA) - 2012

We use a natural experiment to show that the presence of an external examiner in standardized school tests reduces the proportion of correct answers in monitored classes by 5.5 to 8.5% – depending on the grade and the test – with respect to classes in schools with no external monitor. We...

Persistent link: https://www.econbiz.de/10010814463

Unscheduled School Closings and Student Performance

Marcotte, Dave E.; Hemelt, Steven W. - Institute for the Study of Labor (IZA) - 2007

Do students perform better on statewide assessments in years in which they have more school days to prepare? We explore this question using data on math and reading assessments taken by students in the 3rd, 5th and 8th grades since 1994 in Maryland. Our identification strategy is rooted in the...

Persistent link: https://www.econbiz.de/10005822951

Testing the Correlated Random Coefficient Model

Heckman, James J.; Schmierer, Daniel; Urzua, Sergio - Institute for the Study of Labor (IZA) - 2009

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 baseline-pretreatment 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/10008527326

Evaluating Dominance Ranking of PSID Incomes by Various Household Attributes

Maasoumi, Esfandiar; Heshmati, Almas - Institute for the Study of Labor (IZA) - 2005

We examine the dynamic evolution of incomes, both disposable and gross, for several groups in the PSID panel data at several points from 1968 to 1997. We employ the extended Kolmogorov-Smirnov tests of First and Second Order Stochastic Dominance (SD) as implemented by Maasoumi and Heshmati...

Persistent link: https://www.econbiz.de/10005761884

The Revealed Preference Approach to Collective Consumption Behavior: Testing, Recovery and Welfare Analysis

Vermeulen, Frederic; Cherchye, Laurens; Rock, Bram De - Institute for the Study of Labor (IZA) - 2007

nonparametric testing tools for data consistency with special cases of the collective model, which impose specific structure on the … preferences of the group members (in terms of consumption externalities and public consumption); and we show that these testing … income shares that underlie observed (collectively rational) group behavior. In addition, we present formally similar testing …

Persistent link: https://www.econbiz.de/10005762164

Three New Empirical Tests of the Pollution Haven Hypothesis When Environmental Regulation is Endogenous

Millimet, Daniel L.; Roy, Jayjit - Institute for the Study of Labor (IZA) - 2011

The validity of existing empirical tests of the Pollution Haven Hypothesis (PHH) is constantly under scrutiny due to two shortcomings. First, the issues of unobserved heterogeneity and measurement error in environmental regulation are typically ignored due to the lack of a credible, traditional...

Persistent link: https://www.econbiz.de/10009246700

Estimating the Return to Endogenous Schooling Decisions for Australian Workers via Conditional Second Moments

Klein, Roger; Vella, Francis - Institute for the Study of Labor (IZA) - 2006

This paper employs conditional second moments to identify the impact of education in wage regressions where education is treated as endogenous. This approach avoids the use of instrumental variables in a setting where instruments are frequently not available. We employ this methodology to...

Persistent link: https://www.econbiz.de/10005822331

On the Sensitivity of Return to Schooling Estimates to Estimation Methods, Model Specification, and Influential Outliers If Identification Is Weak

Jaeger, David A.; Parys, Juliane - Institute for the Study of Labor (IZA) - 2009

We provide a comparison of return to schooling estimates based on an influential study by Angrist and Krueger (1991) using two stage least squares (TSLS), limited information maximum likelihood (LIML), jackknife (JIVE), and split sample instrumental variables (SSIV) estimation. We find that the...

Persistent link: https://www.econbiz.de/10005030897

Estimating a Class of Triangular Simultaneous Equations Models Without Exclusion Restrictions

Klein, Roger; Vella, Francis - Institute for the Study of Labor (IZA) - 2006

This paper provides a control function estimator to adjust for endogeneity in the triangular simultaneous equations model where there are no available exclusion restrictions to generate suitable instruments. Our approach is to exploit the dependence of the errors on exogenous variables (e.g....

Persistent link: https://www.econbiz.de/10005566652