Golden Rule Savings Rate (of Optimal Growth) Golden Rule savings rate English golden rule savings rate English http://en.wikipedia.org/wiki/Golden_Rule_savings_rate 黄金律貯蓄率 黄金律貯蓄率 http://en.wikipedia.org/wiki/Golden_Rule_savings_rate English Golden Rule Savings Rate (of Optimal Growth) English 最適成長の黄金ルール English