This article in the New York Times shows how the drug industry is able to influence the behaviours of those on their payroll - for instance:

From 2000 to 2005, drug maker payments to Minnesota psychiatrists rose more than sixfold, to $1.6 million. During those same years, prescriptions of antipsychotics for children in Minnesota’s Medicaid program rose more than ninefold.  Those who took the most money from makers of atypicals (a class of drug) tended to prescribe the drugs to children the most often, the data suggest.

Read the full article on the Mindfreedom website.