What has the author John M Vernon written?
John M. Vernon has written:
'A note on estimation in market structure-performance studies'
-- subject(s): Advertising, Marketing, Mathematical models,
Profit
'Concentration, promotion, and market share stability in the
pharmaceutical industry' -- subject(s): Advertising, Drugs,
Marketing, Mathematical models, Pharmaceutical industry
'Profitability and market structure' -- subject(s): Advertising,
Marketing, Profit