31. "Can I tell you if there's any causal relationship ? 32. Is it a causal relationship between prohibition and popularity? 33. They conclude that there is a causal relationship between telecommunications infrastructure investment and aggregate output. 34. Regression analysis is widely used for prediction and causal relationships between the independent and dependent variables. 35. The causal relationship is often a little spotty. 36. No experimental or longitudinal studies have demonstrated a true causal relationship between emotion and sudden conversion. 37. This is why validity is important for quasi experiments because they are all about causal relationships . 38. Also, correlations in economics are always dangerous because they do not prove or establish causal relationships . 39. No definitive causal relationship has yet been established. 40. The U . S . government insists there is no scientific proof of a causal relationship .
