Worth a dam?

Is it worth a dam?

Once a sign of modernization and growth, dams are often seen today as symbols of environmental and social devastation. Over 800,000 dams have been built worldwide to provide drinking water, flood control, hydropower, irrigation, navigation, and water storage. Dams do indeed provide these things,but at the cost of several adverse, unexpected effects: disruption of ecosystems, decline of fish sto...

A system worth saving.

The country will mark Canada Health Day on May 12, so CMAJ asked Dr. Michael Gordon to reflect on Canada's health care system and the changes it has seen and will see. The special day, cosponsored by the Canadian Public Health Association, is designed to highlight "the need for better communication between health professionals and the communities they serve." In this article, Gordon reflects on...

Comparable Worth: A Rejoinder

Both the choice and crowding hypotheses can explain occupational wage differentials. If wage differentials are the product of choice, there is no cause for concern because individuals who freely choose to enter a lower-paying occupation cannot be worse off. If wage differentials are the product of crowding (discrimination), we demonstrate that the best solution is to attack barriers to entry di...

A question worth asking?

What is a Citation Worth?

A robust finding in all studies is that citations are a positive and significant determinant of earnings over almost all of the observed range of citation levels. The marginal value of a citation (when the level of citations is zero) varies between $50 and SJ .300. Some differences in marginal values may be due to differences in citation practices among disciplines while others may be due to di...