Probing the link between gross profitability and R&D spending.
Lichtenberg
F R
FR
Columbia University in New York City, Health Affairs, USA.
D003362:Cost-Benefit Analysis; D004341:Drug Evaluation / Q000191:economics*; D004345:Drug Industry / Q000191:economics*; D004465:Economic Competition; D006801:Humans; D012106:Research / Q000191:economics*; D014481:United States