Erik Meijer is a senior economist at the Center for Economic and Social Research at USC. Much of his current research is in the study of aging: health, cognition, dementia, Social Security, retirement, and investment. Recent and ongoing work includes estimating the cost of dementia; investigating the relation between retirement and cognitive decline; measuring cognition and dementia and estimating dementia prevalence and its heterogeneity across socio-demographic groups; the relation between health insurance, health care access, and health; and the relation between non-monetary job characteristics, work-life balance, and retirement. He has also been one of the leading investigators of the successful RAND Continuous 2012 Presidential Election Poll and the 2016 and 2020 USC Dornsife/LA Times "Daybreak" poll. An important area of Erik's research and development is data collection, data dissemination, and data quality. He was trained in both econometrics and psychometrics, and a significant body of his research is devoted to developing the intersection of these fields, especially applying psychometric measurement models to economic problems. In addition, he has worked on a variety of other topics in economics, econometrics, psychometrics, and statistics, such as preference heterogeneity and individual choices in labor supply, housing demand, and travel demand, bias correction and variance estimation in clustered samples, sample selectivity, central bank independence, and money supply. Erik is also an adjunct economist at the RAND Corporation.