Correlation vs Causation Findings at graveyard Height of grave pillars is positively correlated with the age at death Causality Height of Height of Gave Pillar Longevity Longevity Gave Pillar Wealth Longevity ight Gave Pillar O Copy rights reserved, Zou Deqiang 2121 21 © Copy rights reserved, Zou Deqiang Correlation vs. Causation • Findings at graveyard: ¾Height of grave pillars is positively correlated with the age at death • Causality: Height of Gave Pillar Longevity Height of Gave Pillar Longevity Height of Gave Pillar Longevity Wealth