编者按 20世纪90年代初，全球货币政策加速由经验操作迈向规则框架。以泰勒规则为代表的新范式，重塑了利 率决策逻辑，并重新界定"规则与自由裁量"的边界。本文沿弗里德曼至泰勒的思想脉络，回顾美联储在 格林斯潘时期对利率规则的实践吸收与制度化过程。研究指出，泰勒以简洁的反应函数将抽象规则转化 为可操作工具，使规则成为提升政策透明度与央行信誉的沟通机制。尽管弗里德曼未采纳以利率为核心 的操作体系，其"以规则约束政策"的理念已在泰勒框架下实现制度化延展，为后冷战时期的货币政策提 供了新的分析范式。 从弗里德曼到泰勒：1990年代货币政策规则的复兴 （From Friedman to Taylor: The Revival of Monetary Policy Rules in the 1990s） 01 研究背景 20世纪90年代，货币政策规则的研究迎来复兴，其中约翰·泰勒（John Taylor）发挥了关键作用。1992至 1993年间，他提出并推广了"泰勒规则"（Taylor rule），这一概念迅速在学术界和政策界产生影响，被 视为连接两种长期并行的货币政策思潮的重要桥梁：其一是以米尔顿·弗里德曼（Milton ...

Core Insights - The article discusses the challenges in understanding economic cycles through the lens of Kalecki's business cycle model, emphasizing the inherent uncertainties and complexities within economic systems [2][4][8]. Group 1: Kalecki's Model and Its Challenges - Kalecki's model presents a closed-loop system where profits lead to investments, which in turn create jobs and income, ultimately affecting consumption and profits again [2]. - The model struggles to define the critical thresholds for economic stability, leading to a vague understanding of when the economy shifts from stability to chaos [3][5]. - Various economists attempted to refine Kalecki's model but faced limitations in providing clear stability criteria, often resulting in overly simplified linear models that do not reflect real-world complexities [3][4][8]. Group 2: Yang Xiaokai's Contributions - Yang Xiaokai challenged the notion of solvability in Kalecki's model, highlighting the existence of a region of parametric uncertainty that complicates predictions [4][5]. - He posited that some uncertainties are inherent and cannot be eliminated, likening the economy to a rainforest where unpredictable events can lead to significant consequences [8][10]. - Yang's insights illuminated the existence of these uncertainties, suggesting that recognizing the complexity of economic systems is crucial for understanding their behavior [9][12]. Group 3: Implications for Economic Understanding - The article suggests that policymakers should focus on robustness rather than precise control, acknowledging the potential for multiple equilibria and regions of indeterminacy within economic models [15]. - It emphasizes the importance of respecting the complexities of economic systems, which can lead to better preparedness for various economic states [15].

Core Viewpoint - The article emphasizes the need for "patient capital" to support early-stage, small, and innovative investments in the capital market, highlighting that the essence of patient capital lies in a higher risk appetite rather than merely long-term investment horizons [1][4][10]. Summary by Sections Patient Capital and Risk Preference - Patient capital is fundamentally characterized by a high risk preference, which is essential for supporting investments that are uncertain and have higher failure rates [4][10]. - The article argues that static and dynamic wealth effects are crucial sources of patient capital, with static wealth effects indicating that wealthier individuals typically have a higher risk appetite due to lower necessity for immediate consumption [4][20]. Static Wealth Effect - The static wealth effect suggests that as wealth accumulates, the marginal utility of wealth decreases, allowing wealthier individuals to take on more risk [20][24]. - Empirical studies indicate a positive correlation between income levels and risk preference, with higher income leading to lower risk aversion [25][26]. Dynamic Wealth Effect - The dynamic wealth effect highlights that the growth of patient capital is contingent upon the sustained prosperity of capital markets rather than the reverse [5][8]. - Historical data from the U.S. shows that longer investment horizons correlate with higher probabilities of positive returns, reinforcing the importance of a thriving stock market for attracting patient capital [5][6]. Role of Wealthy Individuals - Wealthy individuals are identified as a significant source of patient capital, as they can afford to invest in high-risk ventures without jeopardizing their financial stability [20][22]. - The article discusses the historical context of wealthy individuals funding early-stage ventures, illustrating their critical role in the development of the venture capital ecosystem [21][23]. Policy Recommendations - The article advocates for an expansionary redistribution policy, which includes central bank actions to support fiscal deficits and enhance the purchasing power of lower-income groups, thereby stimulating demand and economic growth [7][50]. - It suggests that combining estate taxes with donation incentives can effectively channel funds from wealthy individuals into patient capital, avoiding capital outflows [8][51]. Challenges and Considerations - The article notes that the current negative GDP deflator indicates a confluence of short, medium, and long-term demand deficiencies, necessitating policy interventions to address these issues [7][39]. - It emphasizes the importance of maintaining a favorable economic environment to support the growth of patient capital and mitigate risks associated with inflation and supply constraints [50][52].