Short Course on Construction of Weights in Surveys
Co-sponsored by AAPOR and DC-AAPOR
March 16-17, 2017
Bureau of Labor Statistics Conference Center, 2 Massachusetts Ave., N.E., Washington, DC

Regular Price (After January 31st)
2017 Members: $100
2017 Non-Members: $300 (includes AAPOR and DC-AAPOR membership)

Most surveys are designed to provide statistics for a possibly (very) large number of characteristics of interest. Typically, the data collected are stored in a rectangular data file, each row corresponding to a sample unit and each column corresponding to a characteristic of interest. Made available on the data file is a weighting system. The idea is to construct a single weighting system applicable to all the characteristics of interest. The typical weighting process involves three major stages. At the first stage, each unit is assigned a base weight, which is defined as the inverse of its inclusion probability. The base weights are then modified to account for unit nonresponse. At the last stage, the weights adjusted for nonresponse are further modified to ensure consistency between survey estimates and known population totals. When needed, the weights undergo a last modification through weight trimming or weight smoothing methods in order to improve the efficiency of survey estimates. The goal of the workshop is to provide a detailed (theoretical and practical) description of each stage of the weighting process. Throughout the workshop, different concepts will be illustrated through live simulation studies.

About the Instructor: David Haziza is an Associate Professor in the Department of mathematics and statistics at the Universite de Montreal.

For more information and to register, click here.

Human Trafficking Prevalence Estimation Methods in the United States: A Technical Evaluation
Thursday, March 16, 2017 12:30-2:00 pm
American Association for the Advancement of Science (AAAS), 1200 New York Avenue NW, Washington, DC
Cost: Free! RSVP required.

*DC-AAPOR is a co-sponsor of this free event. For more information and to RSVP, click here.

Speaker: Davina P. Durgana, PhD, is Senior Researcher and Statistician on the Global Slavery Index of the Walk Free Foundation.
Chair: Theresa Harris, AAAS Scientific Responsibility, Human Rights and Law Program

This talk will summarize the collaborative efforts of the Walk Free Foundation and its partners to evaluate the technical and statistical merits of potential methods of estimating human trafficking prevalence in the United States. This presentation will solicit and encourage open discussion around the presented methods and will aim to foster a collaborative atmosphere of constructive criticism and feedback as the Walk Free Foundation and others formalize their recommendations for the best technical methods to estimate human trafficking at a national level in the United States. Some of the methods we will be discussing include Multiple Systems Estimation (MSE), Respondent Driven Sampling (RDS), and various online and phone-based survey methods.