Smith, James P.; van soest, arthur; Kapteyn, Arie - National Bureau of Economic Research (NBER) - 2009
To analyze the effect of health on work, many studies use a simple self-assessed health measure based upon a question … such as "do you have an impairment or health problem limiting the kind or amount of work you can do?" A possible drawback … fact that they don't work, non-working respondents may classify a given health problem as a more serious work limitation …