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1
Common Ownership and Competition in the Ready-to-Eat Cereal..
NBER working paper series, no. w28350
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9
Ask Your Doctor? Direct-to-Consumer Advertising of Pharmace..
NBER working paper series, no. w21045
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13
Do Newspapers Serve the State? Incumbent Party Influence on..
NBER working paper series, no. w18164
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14
Competition and Ideological Diversity: Historical Evidence ..
NBER working paper series, no. w18234