...SEW Blog › Other Engines: Baidu › Baidu's ProfitIncreases 91% in Third Quarter 2008 Home Blog Forums...Purchase Decisions » October 23, 2008 Baidu's ProfitIncreases 91% in Third Quarter 2008 Chinese search engine...
http://blog.searchenginewatch.com/blog/081023-112937
...measure the results a month or year later one could easily argue that any sales increases, expense reductions or profitincreases could have been caused by other factors such as the economy, the “Hawthorne Effect”8 , or even random chance...
http://www.epospartners.co.uk/rms_effects_of_pos_on_profitability.pdf