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Yoko Nishihara Wataru Sunayama Kazunori Nishimura 《The Review of Socionetwork Strategies》2014,8(1):35-49
Bulletin Board Systems (BBSs) on the Web are used by many users posting comments on threads. Each thread carries a subject of discussion. Most users post comments related to a subject. However, unrelated comments are also posted. The unrelated comments distract users and diminish their understanding of the entire story of a thread. Comments unrelated to a subject have to be filtered automatically. This paper proposes a method that extracts comments related to a thread subject from a thread of BBS. The method extracts two types of comments: comments related to a thread subject (main comments), and comments related to main comments (sub-comments). The main comments are extracted by a user ID and keywords in the comments. The sub-comments are extracted by explicit and implicit anchor texts in the comments. We experimented with the proposed method and verified that comments extracted by the proposed method support participants in understanding the entire story of a thread. 相似文献
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In this paper, we analyze the strategic residential location choices of multiple siblings who receive childcare assistance from their parents. Our three stage game yields a theoretical result that first-born children are more likely to live together with or close to their parents than second-born children, which is supported by our estimation results using Japanese micro-data. We also empirically show that the childcare assistance from parents is one of the determinants of the residential location choice of siblings. This paper is the first to succeed in explaining the residential location choice of siblings in Japan using economic incentives. 相似文献
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Akio Matsumoto 《Metroeconomica》2008,59(4):713-735
Since a finite time delay in government purchases of goods and service cannot be ignored, this paper studies how such a time lag in a fiscal policy affects the stability of the income adjustment process. Formulating the income adjustment process with time delay, it adopts two different approaches: one is a fixed time lag and the other is a continuously distributed lag. It is demonstrated that the continuously distributed time lag has the stronger destabilizing effect if the adjustment of the government expenditure is slow while the fixed lag has the stronger destabilizing effect if this adjustment is rapid. 相似文献
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Shuping Chen Dawn Matsumoto Shiva Rajgopal 《Journal of Accounting and Economics》2011,51(1-2):134-150
We investigate firms that stop providing earnings guidance (“stoppers”) either by publicly announcing their decision (“announcers”) or doing so quietly (“quiet stoppers”). Relative to firms that continue guiding, stoppers have poorer prior performance, more uncertain operating environments, and fewer informed investors. Announcers commit to non-disclosure because they (i) do not expect to report future good news or (ii) have lower incentives to guide due to the presence of long-term investors. The three-day return around the announcement is negative. Stoppers subsequently experience increases in analyst forecast dispersion and decreases in forecast accuracy but no change in return volatility or analyst following. 相似文献
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After surveying the evolution of the major methodologies in inflation hedging, this study presents a unique methodology that uses principal component factor analysis to separate the effects of variability in the real rate of return from the nominal rate of return. This approach allows the effects of both anticipated and unanticipated inflation on rates of return to be estimated more precisely. This study finds that art objects perform well in terms of average real rates of return and that the market, though not perfect, integrates anticipated inflation into the rates of return. However, unanticipated inflation is very often negatively related to the rates of return. 相似文献
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Decisions in Economics and Finance - This study demonstrates the possibility of cyclic capital accumulation in the case in which there are delays in capital implementation and estimation of capital... 相似文献
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We examine the impact of the rapidly expanding mobile banking service “mobile money” on rural households' ability to smooth investment in schooling after a negative shock. We find that a negative shock induces a 9.3‐percentage point decrease in per school‐age child educational expenditure for households who do not use mobile money compared to an 8.3‐percentage point decrease for households that have adopted mobile money. The underlying mechanism is an increase in remittance receipt and the diversity of senders owing to the reduction in transactions cost provided by mobile money. We show that our results are robust to alternative mechanisms. We use the expansion in mobile money agent network as an exogenous variation in access to mobile money. 相似文献