Household investment mistakes are an important concern for researchers and policymakers alike; portfolio underdiversification ranks among those mistakes that are potentially most costly. However, its roots and empirical importance are poorly understood. I estimate quantitatively meaningful...

Economic theory suggests that households should invest their financial wealth in a combination of cash and a well-diversified equity portfolio. Yet, many households' equity investments are strongly concentrated in a few assets. Attempts to explain this discrepancy have included low levels of...

How great an effect does the structure of income taxes have on women’s labour market participation? This issue is investigated using a discrete choice static labour supply model for married couples in Ireland. The model incorporates fixed costs of working and simultaneously explains...