... provides the results of the model underlying the instrument γi. In addition the results have merit on their own, as it the results give us direct insight into the effect of work and workhistory ... reduce the inflow into DI schemes, the number of DI claimants continued to grow. In 1970 about 200,000 were enrolled in the DI scheme, in 1980 this hasgrown to 650,000 and continued to grow to about ... two points in time and the survey lacks information on the history of health related decisions (the vector Z of section 3). We therefore have to assume that •encompasses elements of the initial...