Design and Methodology

Rigorous statistical design and an advanced methodological expertise underlie all NORC studies. At the critical early stages, research projects are defined and scoped by highly skilled NORC staff members in collaboration with our clients.

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2010 National Sample Frame. U.S. households are the primary unit for sample selection for many studies, but sample frames for households can be difficult and expensive to create. In order to provide a sample frame for use by many surveys, NORC has constructed the 2010 National Sample Frame, based on the 2010 Census information. This sample is representative of over 99% of U.S. households and provides a listing of almost 3 million households, including over 80,000 rural households. More

Evaluation and Analytic Support for HHS Healthy Weight and Obesity Initiative. NORC is providing evaluation support to the U.S. Department of Health and Human Services (HHS), assisting the Department in tracking progress on reversing the obesity epidemic. More

State-specific Design Parameters for Designing Better Evaluation Studies. This IES-funded project seeks to use State Longitudinal Data Systems (SLDS) to estimate variance components and intraclass correlations for use in multi-level study designs in education.  Having plausible values of intraclass correlations is essential to planning how many schools and students are needed for an evaluation design.  This project is a continuation of efforts by Hedges and Hedberg to provide guidance on these parameters to the research community. Whereas their previous work used national probability samples to estimate these parameters, the current project uses state data. More

Trends in Health Insurance Premiums. This study for the Assistant Secretary for Planning and Evaluation (ASPE) in the Department of Health and Human Services (HHS) aims to build a baseline data set for the years 2008-2011 from 30 states that will enable the HHS and others to evaluate the impact of the Affordable Care Act. More

VHA Point of Care Technologies. Working in partnership with Harris Corporation, NORC is participating in a project with the Veterans Health Administration (VHA) Office of Information, Emerging Health Technologies, on new and emerging point-of-care (POC) technologies. More

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