We treat expenditures that create intangible assets as investments and instead of expensing them, we add them back to earnings when measuring the return on equity of firms while constructing the profitability factor in the Fama and French (2015) five factor model. The profitability factor we...

Using a two-period model of a commodity market with a large number of atomistic consumers and two strategic sellers, we show that a speculator with access to storage can lower the market price while buying and raise the price while selling by clever use of limit, stop-loss, and market orders....

Entrepreneurship requires energy and creativity as well as business acumen. Some factors that contribute to entrepreneurship may decline with age, but business skills increase with experience in high level positions. Having too many older workers in society slows entrepreneurship. Older workers...