This thesis studies three distinct questions within the field of health economics using microeconometric methods. These are: First, the role of social capital on the health outcomes of the elderly population in the eastern provinces of Indonesia. Second, the relative importance of personal and professional circumstances against socioeconomic conditions as determinants of relocation decisions for Australian general practitioners. And, third, the contributors to the differences in work supply between male and female physicians in Australia. The final study analyses the work supply among general practitioners, internal specialists, surgical specialists and other specialists separately.