Key points are not available for this paper at this time.
James P. Smith, Frank Stafford, James R. Walker, Introduction to the JHR's Special Issue on Cross-National Comparative Research Using Panel Surveys, The Journal of Human Resources, Vol. 38, No. 2, Special Issue on Cross-National Comparative Research Using Panel Surveys (Spring, 2003), pp. 231-240
Smith et al. (Wed,) studied this question.