1,721,035 research outputs found
The Market for Borrowing Corporate Bonds
Full text linkThis paper describes the market for borrowing corporate bonds using a comprehensive dataset from a major lender. The cost of borrowing corporate bonds is comparable to the cost of borrowing stock, between 10 and 20 basis points per year. Factors that increase borrowing costs are loan size, percentage of inventory lent, rating, and borrower identity. Trading strategies based on cost or amount of borrowing do not yield excess returns. Bonds with corresponding CDS contracts are more actively lent than those without. Finally, the 2007 Credit Crunch did not affect average borrowing cost or loan volume, but increased borrowing cost variance.
Who Benefits from KIPP?
Full text linkCharter schools affiliated with the Knowledge is Power Program (KIPP) are emblematic of the No Excuses approach to public education. These schools feature a long school day, an extended school year, selective teacher hiring, strict behavior norms and a focus on traditional reading and math skills. We use applicant lotteries to evaluate the impact of KIPP Academy Lynn, a KIPP charter school that is mostly Hispanic and has a high concentration of limited English proficiency (LEP) and special-need students, groups that charter critics have argued are typically under-served. The results show overall gains of 0.35 standard deviations in math and 0.12 standard deviations in reading for each year spent at KIPP Lynn. LEP students, special education students, and those with low baseline scores benefit more from time spent at KIPP than do other students, with reading gains coming almost entirely from the LEP group.
Essays on applied mircoeconomics and finance
No full textThesis: Ph. D., Massachusetts Institute of Technology, Department of Economics, 2019Cataloged from PDF version of thesis.Includes bibliographical references (pages 255-262).This dissertation consists of four chapters. Chapter 1 studies the effect of online review manipulations on review systems. Chapter 2 and Chapter 3 are co-authored with Ali Kakhbod and focus on post-trade transparency in dynamic over-the-counter markets. Chapter 4 is co-authored with Umut Dur, Parag A. Pathak and Tayfun Sönmez and studies the effect of the Taiwan mechanism, a mechanism that allocates high school seats to applicants. Chapter 1 shows that the conventional impression holds in the short-run that review manipulation makes review systems less informative. In the long-run, however., a manipulated review system can contain the same level of information as an un-manipulated counterpart. I develop a dynamic programming model with fixed product quality and naive buyers who are unaware of manipulation. I then extend it to consider endogenous product quality and sophisticated buyers. I also identify an unexpected effect of a policy to target sellers and check for manipulation.Chapter 2 studies how mandatory transparency (through TRACE), along with the long-term incentive of informed dealers, affects market price informativeness, liquidity and welfare in dynamic over-the-counter (OTC) markets. We show that the public disclosure of additional information about past trades, paradoxically, makes the markets more opaque, by reducing the market price informativeness. Thus, surprisingly, transparency requirements such as U.S. Dodd-Frank Act may make markets more opaque. However, this market opacity creates liquidity and increases welfare. To enhance financial transparency and improve the price informativeness as well as the market liquidity and welfare, an effective approach is to randomly audit dealers. Chapter 3 then studies how public disclosure of past trade details affects price discovery dynamics under asymmetric information with heterogenous hedging motives.We model that an informed buyer (informed trader) sequentially trades with a series of uninformed sellers (hedgers). The informed buyer is forward-looking and risk-neutral, and uninformed sellers are myopic and heterogeneously risk-averse. We discover that sellers' price discovery over the underlying fundamentals is crucially affected by what they can observe about past trade details. Specifically, (i) post-trade price transparency delays price discovery, but once it happens, it is always perfect. (ii) In contrast, when only past order information is available, price discovery can never be perfect, and can even be in the wrong direction. (iii) The availability of past trade details, paradoxically, makes it easier for the informed buyer to hide her private information and offer opaque prices. We establish that, under some minor regularity conditions, our equilibrium characterization achieves the maximal degree of ignorance among all pure-strategy PBE.Hence, this chapter can be viewed as a worst case analysis for regulators who care about market transparency. Moreover, we show that our findings are robust when the informed party's bargaining power decreases along the length of past trade history. Finally, we extend our results to the case where the informed buyer has a non-zero outside option, and the case where both parties switch their trading positions. Chapter 4 analyzes the properties of the Taiwan mechanism, used for high school placement nationwide starting in 2014. In the Taiwan mechanism, points are deducted from an applicant's score with larger penalties for lower ranked choices. Deduction makes the mechanism a new hybrid between the well-known Boston and deferred acceptance mechanisms. Our analysis sheds light on why Taiwan's new mechanism has led to massive nationwide demonstrations and why it nonetheless still remains in use.by Fei Song.Ph. D.Ph.D. Massachusetts Institute of Technology, Department of Economic
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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