A tradeable obligation approach to the CRA

Community Reinvestment Act of 1977

Stranger Things about Forcing without AC

Typically, set theorists reason about forcing constructions in the context of ZFC. We show that without AC, several simple properties of forcing posets fail to hold, one of which answers Miller's question from arXiv:0704.3998.Comment: 5 page

Many Different Uniformity Numbers of Yorioka Ideals

Using a countable support product of creature forcing posets, we show that consistently, for uncountably many different functions the associated Yorioka ideals' uniformity numbers can be pairwise different. In addition we show that, in the same forcing extension, for two other types of simple cardinal characteristics parametrised by reals (localisation and anti-localisation cardinals), for uncountably many parameters the corresponding cardinals are pairwise different.Comment: 29 pages, 4 figure

The Distribution of Patterns in Random Trees

Let $T\_n$ denote the set of unrooted labeled trees of size $n$ and let $T\_n$ be a particular (finite, unlabeled) tree. Assuming that every tree of $T\_n$ is equally likely, it is shown that the limiting distribution as $n$ goes to infinity of the number of occurrences of $M$ as an induced subtree is asymptotically normal with mean value and variance asymptotically equivalent to $\mu n$ and $\sigma^2n$, respectively, where the constants $\mu>0$ and $\sigma\ge 0$ are computable

Workload characterization of the shared/buy-in computing cluster at Boston University

Computing clusters provide a complete environment for computational research, including bio-informatics, machine learning, and image processing. The Shared Computing Cluster (SCC) at Boston University is based on a shared/buy-in architecture that combines shared computers, which are free to be used by all users, and buy-in computers, which are computers purchased by users for semi-exclusive use. Although there exists significant work on characterizing the performance of computing clusters, little is known about shared/buy-in architectures. Using data traces, we statistically analyze the performance of the SCC. Our results show that the average waiting time of a buy-in job is 16.1% shorter than that of a shared job. Furthermore, we identify parameters that have a major impact on the performance experienced by shared and buy-in jobs. These parameters include the type of parallel environment and the run time limit (i.e., the maximum time during which a job can use a resource). Finally, we show that the semi-exclusive paradigm, which allows any SCC user to use idle buy-in resources for a limited time, increases the utilization of buy-in resources by 17.4%, thus significantly improving the performance of the system as a whole.http://people.bu.edu/staro/MIT_Conference_Yoni.pdfAccepted manuscrip

An Economic Analysis of Bank Regulatory Reform: The Financial Institutions Safety and Consumer Choice Act of 1991

This Article analyzes the interaction between the bank regulatory system and the market for financial services and examines the ways in which bank regulation affected profitability and risk-taking both before and after 1980. The Article focuses on the range of business strategies available to banks during each period and the incentives operating on bank shareholders and managers in selecting from available strategies. The Article suggests that although banks have always been subject to restrictions in the services they may provide, before 1980 those restrictions did not prevent banks from adopting profitable, low-risk business strategies. Indeed, the bank regulatory system induced banks to adopt such strategies. As a result of changes in financial services markets that began in the mid-1970s, however, the profitability of legally permissible low-risk strategies declined for many banks. The deposit insurance system\u27s implicit subsidy of risk-taking consequently became more attractive to bank shareholders and managers than it had been in past. The Article then suggests the type of regulatory reform that is necessary in order to allow banks to operate effectively in the modem market for financial services. Finally, the Article discusses the ways in which FISCCA would respond to the need for reform