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Old 02-09-2013, 02:11 AM   #45
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Join Date: Aug 2009
Location: Gliwice, Poland
Posts: 68

Indio, I am not sure if you can make conclusions on the relative strength of PS and RF eras based on evidence that you presented.

If top players in the 1990 s were more prone to lose in the early rounds of tournaments as compared to top players ten years later, then three kinds of effects may be mentioned to explain such a pattern.

- top players from the 1990 s weren't as consistently strong as their counterparts a decade later,
- the field was deeper in the 1990 s then ten years later,
- surfaces were less similar in the 1900 s

How can you tell wchich is the case with the data you showed?
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