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We present new tests of three theories of the labor market: intertemporal substitution, hours restrictions, and implicit contracts. The intertemporal substitution test we implement is an exclusion tes...
In the Lucas-Rapping (1969) model of the labour market, fluctuations in unemployment represent individuals optimally adjusting their labour supply behaviour in response to fluctuations in wage rates o...
Mother to child transmission of HIV (MTCT) control goal is achievable when all pregnant mothers test for HIV and collect the results enabling timely eligibility and access to anti-retroviral therapy (...
The paper focuses on the early career patterns of young male and female workers. It investigates potential dynamic links between statistical discrimination, mobility, tenure and wage profiles. The m...
This paper proposes a quantile regression estimator for a panel data model with interactive effects potentially correlated with the independent variables. We provide conditions under which the slope p...
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 availabl...
We address the long standing question of whether production factors are paid their marginal products. We propose a new approach that circumvents the need to specify production functions and to compare...
Using a large representative German data set and various concepts of self-employment, this paper tests the "jack-of-all-trades" view of entrepreneurship by Lazear (AER 2004). Consistent with its theor...
Based on the notion that entrepreneurship is a 'local event', the literature argues that self-employed workers and entrepreneurs are 'rooted' in place. This paper tests the 'residential rootedness'-hy...
The Independence of Irrelevant Alternatives assumption inherent in multinomial logit models is most frequently tested with a Hausman-McFadden test. As is confirmed by many findings in the literature, ...
Testing for HIV is becoming more available in Africa. Global advocates of testing see it as key to AIDS prevention. However, testing is not always perceived as a good thing by people at risk. Here, we...
The plan to increase HIV testing is a cornerstone of the international health strategy against the HIV/AIDS epidemic, particularly in sub-Saharan Africa. This paper highlights a problematic aspect of...
This paper addresses the question of whether administrative data sources, such as performance monitoring data, can be used for program evaluation purposes. It argues that under certain circumstances, ...
Extensive cognitive testing aided the development of a new questionnaire that is readily understood, no longer evokes negative emotional responses, and allows analysts to pinpoint the circumstances as...
Results show that combining race and Hispanic origin questions might decrease counts of Hispanics, and including a multiracial category might decrease counts of American Indians and Alaska Natives. Th...

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