- The Betson-Rothbarth 1990 economic study was republished in 2001 by David M. Betson using updated CES data.
- Study was funded by University of Wisconsin Institute for Research on Poverty & child support projects in CA & MI
- It was called “Chapter 5: Parental Expenditures on Children.” in Judicial Council of California, Review of Statewide Uniform Child Support Guideline. San Francisco, California, (2001)
- It used both the Engel and Rothbarth estimation methods.
-Besides updated data (1996-1999 CES data), there were no other changes. - Used the Per Capita Method
- Used the Indirect Cost Proxy
- Used in conjunction with Income Shares
- As a proportion of total household expenditures, child rearing expenditures using the Rothbarth estimation method are 26% for one child, 36% for two children, and 42% for three children.
- Three states use this study: District of Columbia, Georgia, Nebraska, South Carolina, and Tennessee