Over-identifying restrictions in economic analysis

The analysis of empirical economics has long made use of a tool called the generalized method of moments (GMM). This method is used as a generic way of estimating parameters in an empirical model where the general shape of ...

New hybrid 'NOSH aspirin' as possible anti-cancer drug

Scientists have combined two new "designer" forms of aspirin into a hybrid substance that appears more effective than either of its forebears in controlling the growth of several forms of cancer in laboratory tests. Their ...