Hypothetical stock market investment experiment in six countries reveals that after controlling for the average profit in the whole stock market subjects prefer losing money rather than gaining money as long as their so-called "friends" lose more money. The sad result is that only 8.2% of the...

"A century ago, life expectancy was roughly 40 years, hence saving for retirement was not an important economic issue. Nowadays, life expectancy exceeds 80 years in many countries, and one should expect to live and consume many years after retirement. Thus, optimizing investments and savings for...

Many investors and institutions have a long-run investment perspective, hence the question of stocks versus bonds in the long-run is of central importance. Despite the great deal of research attention devoted to this issue, views remain conflicting. Indeed, neither stocks nor bonds dominate when...

Diversification across time means changing the asset allocation from one period to another. We show that diversification across time is inferior to a portfolio with the same average asset allocation, held constant over time: it leads to a lower geometric mean, implying that in the long-run it...