Dr. O’Hare is a social demographer who has spent forty years using data to increase public understanding disadvantaged groups. For the past 25 years, he has been involved in the KIDS COUNT project at the Annie E. Casey Foundation. He has been an expert witness in more than a dozen lawsuits and has testified before Congress several times. Most of his professional writing has been for public rather than scholarly audiences, and he has been quoted in numerous newspapers, including the New York Times, The Washington Post, USA TODAY and many other newspapers. He has a Bachelor of Science, Master of Arts, and a Ph.D. from Michigan State University.

• 1. Introduction.- 2. Why the Census is Important.- 3. How Do We Know Who is Missed in the Census?.- 4. The Big Picture on Census Undercount Differentials.- 5. Differentials by Age.- 6. Differentials by Sex.- 7. Differentials by Hispanic Origin Status.- 8. Census Coverage of the Black Population.- 9. Census Coverage of American Indians and Alaskan Natives.- 10. Coverage of Asians.- 11. Census Coverage of Native Hawaiians and Other Pacific Islanders.- 12. Renters and Owners.- 13. Data on Other groups at risk of being undercounted.- 14. Attempts to Reduce/Eliminate Differential Census Undercounts.- 15. Looking toward the 2020 Census.