Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 19 of 19 for “"Sample Selection Bias"”.
-
Corrections for Sample Selection Bias
… developed to correct for the effects of sample selection bias are examined for robustness to violations of assumptions in this Monte Carlo study. Corrections derived by Pearson (1903) for cases of explicit and incidental selection are found to be sensitive to variations in (1) the …
-
Robust and Fair Machine Learning under Distribution Shift
… Then we build a robust framework to address the sample selection bias for fair classification. Next we solve the sample selection bias issue for fair regression. Finally, we propose an adversarial framework to build a personalized model in the distributed setting where the distribution shift …
-
The simulation analysis on the accuracy and efficiency of MIT transaction index
… Geltner and Haurin (2003.) They address the sample selection bias and the noise effect of the transaction prices in small sample. To correct sample selection bias, MIT transaction index use the Heckman two-step. In addition to the correction of sample selection bias the MIT transaction based …
-
A copula approach to sample selection modeling of treatment adherence and viral suppression among HIV patients on antiretroviral therapy (ART) in Namibia
… adherence and viral suppression may result in biased estimates if sample selection is ignored. The study fit a joint distributional model of ART treatment adherence and viral suppression, to adjust for sample selection bias among HIV patients on ART in Namibia, to examine the presence of tail …
-
The Effect of Education on Earnings and Employment in the Informal Sector in South Africa
… least squares with multinomial two-step selection corrections to control for both endogeneity of schooling and sector sample selection bias. Quantile regression and piecewise linear spline function methods were applied to deal with the heterogeneity of the returns to schooling. Moreover, …
-
A Nonparametric Bounds Approach for Hedonic Housing Price Indexes With an Application to the Southern California Market 1996 to 2008
… housing price models partially identified due to sample selection of an unknown form. To construct bounds for the identification region, I use a nonparametric hedonic housing price model that allows spatial correlation and propose estimators of extreme conditional quantiles. The estimated bounds …
-
Three Essays Exploring Heterogeneity Using Quantile Regression
… females exhibit significant heterogeneity. Since sample selection is likely to be a problem in estimation of wage differences due to large differences in labor force participation rates between the groups studied, I develop a technique to control for this type of selectivity bias in the quantile …
-
Social networks, bargaining power within couples, and maternal health care in Tanzania
… that minimises the problem of omitted variable bias, the analysis suggests that these network effects increase the probability of antenatal care completion by an additional 6 to 35 percent, and may be as high as 59 percent. The study further finds that without adequate control of omitted …
-
Statistical aspects of credit scoring
… for needing reject inference is to reduce the sample selection bias that results from using a sample consisting only of accepted applicants to build new scorecards. We show that the characteristic vectors for the rejects do not contain information about the parameters of the observed data …
-
Learning under differing training and test distributions
… learning and learning under covariate shift and sample selection bias. Several new models are derived that directly characterize the divergence between training and test distributions, without the intermediate step of estimating training and test distributions separately. The integral part of …
-
Essays on Rural-Urban Migration in China
… participation estimation. To correct for the sample selection bias, Heckman's two-step procedure is used to estimate the length of migratory work. Empirical results confirm the existence of a migrant network effect on both migration participation and migration length. Schooling increases …
-
HIV and male circumcision in Swaziland, Botswana and Lesotho : an econometric analysis
… impact of MC on HIV. It further tests for any sample selection bias within the data as a result of non-response of HIV testing. The efficacy of MC in reducing the risk of HIV transmissions is dependent on circumcised men continuing to practice safe sex such as a single partner and condom use. …
-
Gender and education : a microeconometric analysis of returns to education in Nigeria
… strategy, the Heckman model to correct for sample selection bias, and the Instrumental Variable model, using distance to the nearest primary and secondary schools as instruments, to accurately estimate returns. Second, by applying the Oaxaca-Blinder decomposition, which relies on the …
-
Firm growth, survival and productivity in South Africa
… correction of potential econometric problems of sample selection bias, growth persistence and heteroscedasticity. The second paper considers the patterns of growth and survival and specifies a simple logit binary survival model that allows for firm and industry specific characteristics as …
-
Innovation Under Stress
… These findings hold after adjusting for possible sample-selection bias using variation from patent examiners’ historical approval rates, and after adjusting for potential endogeneity using pre-scheduled gubernatorial elections for neighbor states. To understand the factors that underlie this …
-
Alcohol income and health: a complicated but desirable mix
… is also examined. Potential endogeneity and selection bias is accounted for throughout. Endogeneity is where an independent variable included in the model is determined within the context of the model (Chenhall and Moers, 2007). An endogenous relationship between income and alcohol and …
-
Three Papers on the Black-White Mobility Gap in the United States
… Missing at Random? An Analysis of the Effect of Sample Selection on Intergenerational Earnings Elasticities by Race Utilizing the Panel Study of Income Dynamics, I assess the effect of sample selection bias on estimates of intergenerational earnings elasticities for white and black father-son …
-
Essays in economic geography: Convergence, inequalities and innovations in the knowledge economy
… 1974), the economic sector (Hewings, 1977), and sample selection bias (Heckman 1979), among others. Once these factors are considered in a hedonic model, the differential of the remaining wages can be interpreted as the existing inequality in wages among urban labor markets in the country. …
-
Investigating product market Integration in the southern African development community : a price-based approach
… The evaluation identifies several different sample selection effects that bias estimates of distance and border effects in the existing literature, and demonstrates the sensitivity of estimates of transaction costs and border effect s for the SADC region to these sample selection biases using …