本文建立一個貨幣內生成長模型，探討勞動休閒決策內生下，環保支出、通貨膨脹率與經濟成長率的關係。本文發現，環保支出規模擴大，有助於提升經濟成長率，但降低了消費佔資本的比例。其次，本文獲得環保支出對於通貨膨脹率之影響不確定的結論，正符合實際資料顯示之趨勢。另外，擴張環保支出，對於社會福利水準的衝擊亦不明確，須視環保舒適價值效果和經濟成長效果對福利的提升程度，與資源變動效果和勞動負效用效果對福利的減損程度而定。

This paper constructs a monetary growth model with elastic labor supply to investigate the policy effect of public abatement expenditures on the inflation rate and on economic growth. One main result is that an extension of public abatement expenditure is conducive to economic growth, but it tends to decrease the consumption-physical capital ratio.Second, the relationship between abatement expenditures and the inflation rate is ambiguous, and most importantly this result could fit in with the empirical data. We also find that the impact of abatement expenditures on social welfare is doubtful, depending on two forces.One force is the social welfare improving effect, including the environmental amenity value effect and the economic growth effect,while the other force is the social welfare deteriorating effect, including the resource mobilization effect and the labor disutility effect.