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We reject the hypothesis that the Federal Reserve's response to the macroeconomy over the period of 1953-1994 can be accurately represented with a fixed-parameter discrete choice model. Thus, we model the Fed's time-varying response with a nonlinear Kalman filter. The estimated time paths of the reaction function coefficients suggest that the Fed has responded countercyclically to movements in the price level except for the middle 1970s when it accommodated inflation. The Fed has generally responded countercyclically to unemployment and output during recessions. However, it has not maintained a countercyclical policy during nonrecessionary times until the 1980s.  相似文献   
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In a recent article in this journal, the authors documented the growing tendency of emerging growth companies to raise substantial equity while remaining privately held through private IPOs, or PIPOs. PIPO financing has created scores of “unicorn” firms—private enterprises with imputed market values of $1.0 billion or more—while allowing them to avoid the challenges of being publicly traded. But as has also been noted, the PIPO process, with its multiple financing rounds and increasingly complex terms, has almost certainly result in some inflated market valuations. Along with inflated values, the contracting process and many of the provisions that result from it often have economic consequences that are poorly understood by at least some of the participants, including the potential for significant wealth transfer between stakeholders as well as overall destruction of enterprise value. And the term sheets containing such provisions appear to become even more “opaque” and more “toxic” with each round of financing. More specifically, the liquidation preferences and ratchets often provided new investors in the later rounds of PIPOs can greatly affect the allocation of the risks and the ownership shares and, in so doing, transfer significant wealth from the entrepreneurs and other older owners. Using a numerical analysis of a representative term sheet, the authors discuss the process of financial contracting for early‐stage companies, providing examples of how negotiations can go wrong and showing exactly when and where the agreed‐upon conditions start to turn toxic for some of the stakeholders. The article closes with the authors’ assessment of the disincentives for entrepreneurs and early‐stage investors created by this often confusing and dilutive venture capital contracting and funding process.  相似文献   
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This paper calculates multifactor productivity trends in seven Canadian mining industries and relates changes in productivity to various factors, including changes in output and factor prices and the decline in the quality of the ore being mined. It is found that productivity decline in mining has been pronounced and tended to predate that of manufacturing by several years. There are indications that the most important factors in the decline have been the fall in mineral grade, contraction of output, increases in interest rates and an apparent decline in the rate of technical innovation.  相似文献   
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