Results 331 to 332 of about 18,306,499 (332)
Some of the next articles are maybe not open access.

Recruitment to breast cancer clinical trials: What makes a difference?

Ca-A Cancer Journal for Clinicians, 2009
exaly  

Differences-in-Differences in Approaches

2014
openaire   +1 more source
difference-in-differences
econometrics econ.em
fos: economics and business
fos: computer and information sciences
methodology stat.me
economics - econometrics
statistics - methodology
8. economic growth
3. good health
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