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You are asked to study the causal effect of education (measured in years) on wage rate...

  1. You are asked to study the causal effect of education (measured in years) on wage rate (dollars per hour). Describe:
  1. An ideal randomized controlled experiment to measure this causal effect
  2. An observational cross-sectional data set with which you could study this effect
  3. An observational time series data set for studying this effect
  4. An observational panel data set for studying this effect  
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