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    Title: 社會網路與貨幣政策: 兼論「權衡」與「法則」
    Social network and monetary policy: rule versus discretion
    Authors: 溫明昌
    Contributors: 陳樹衡
    溫明昌
    Keywords: 社會網路
    互動
    新凱因斯動態隨機一般均衡模型
    貨幣政策
    權衡與法則
    產出缺口
    通貨膨脹
    波動性
    Social Network
    Interaction
    DSGE model
    Monetary policy
    Rule versus Discretion
    Output gap
    Inflation
    Volatility
    Date: 2011
    Issue Date: 2012-10-30 14:04:52 (UTC+8)
    Abstract: 本文建構代理人基之社會網路新凱因動態隨機一般均衡模型(Social Network-Based DSGE model)，並分別使用權衡性門檻型泰勒法則與一般線型泰勒法則作為代理人基之社會網路新凱因斯動態一般均衡模型中的貨幣政策方程式，模擬產出缺口、通貨膨脹、利率等總體經濟變數資料，接著利用模擬資料，探討不同網路結構對產出缺口、通貨膨脹等總體經濟變數的影響，同時比較權衡性貨幣政策與法則性貨幣政策穩定經濟的有效性。
    　　透過產出缺口與通貨膨脹的波動性分析，本研究發現某些特定社會網路結構的影響力大於貨幣政策的影響力，決定了經濟變數的波動程度。在完全連結網路(Fully)的結構下，通貨膨脹與產出缺口的波動度明顯低於其他結構，而無標度網路(Scalefree)的結構會使產出與通膨的波動程度最大。經過驗證，本研究發現群聚度大、平均路徑短的網路結構內節點之間資訊流通速度較快，對穩定經濟有正面助益；相反的，由於無標度網路強大的中心性，使該網路內指標性節點對其餘節點具有龐大影響力，增加節點內決策的不確定性，連帶造成經濟的大幅波動。另外，在相同的網路結構下比較權衡與法則貨幣政策，研究結果指出權衡性政策會造成較大的產出缺口波動，但對抑制通貨膨脹波動的效果較佳；相對的，法則性政策對產出缺口的穩定效果較好，但卻無法兼顧通貨膨脹的波動性。
    We construct an agent-based New Keynesian DSGE model (Dynamic Stochastic General Equilibrium) with different social network structures to investigate the effects of the rule and discretion monetary policy. According to our simulation results, we find the economic stability depends on the specific social network structure rather than the monetary policy basis like rule and discretion. Generally speaking, the more average path length (the less average clustering coefficient) the network structure is, the more economic fluctuation would be. Also, the results show that scalefree network will lead the most dramatic economic fluctuations. These results are ascribed to scale
    -free’s high centrality. However, if the social network structure is too complicate to control, the central banker can only manipulate the monetary policy to stabilize the economy. With different policy basis, we find the rule monetary policy will lead less output gap volatility.
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    Description: 碩士
    國立政治大學
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    Source URI: http://thesis.lib.nccu.edu.tw/record/#G0099258034
    Data Type: thesis
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