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21 – 30 of over 1000The two‐armed Bernoulli bandit (TABB) problem is a classical optimization problem where an agent sequentially pulls one of two arms attached to a gambling machine, with each pull…
Abstract
Purpose
The two‐armed Bernoulli bandit (TABB) problem is a classical optimization problem where an agent sequentially pulls one of two arms attached to a gambling machine, with each pull resulting either in a reward or a penalty. The reward probabilities of each arm are unknown, and thus one must balance between exploiting existing knowledge about the arms, and obtaining new information. The purpose of this paper is to report research into a completely new family of solution schemes for the TABB problem: the Bayesian learning automaton (BLA) family.
Design/methodology/approach
Although computationally intractable in many cases, Bayesian methods provide a standard for optimal decision making. BLA avoids the problem of computational intractability by not explicitly performing the Bayesian computations. Rather, it is based upon merely counting rewards/penalties, combined with random sampling from a pair of twin Beta distributions. This is intuitively appealing since the Bayesian conjugate prior for a binomial parameter is the Beta distribution.
Findings
BLA is to be proven instantaneously self‐correcting, and it converges to only pulling the optimal arm with probability as close to unity as desired. Extensive experiments demonstrate that the BLA does not rely on external learning speed/accuracy control. It also outperforms established non‐Bayesian top performers for the TABB problem. Finally, the BLA provides superior performance in a distributed application, namely, the Goore game (GG).
Originality/value
The value of this paper is threefold. First of all, the reported BLA takes advantage of the Bayesian perspective for tackling TABBs, yet avoids the computational complexity inherent in Bayesian approaches. Second, the improved performance offered by the BLA opens up for increased accuracy in a number of TABB‐related applications, such as the GG. Third, the reported results form the basis for a new avenue of research – even for cases when the reward/penalty distribution is not Bernoulli distributed. Indeed, the paper advocates the use of a Bayesian methodology, used in conjunction with the corresponding appropriate conjugate prior.
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The Howard Shuttering Contractors case throws considerable light on the importance which the tribunals attach to warnings before dismissing an employee. In this case the tribunal…
Abstract
The Howard Shuttering Contractors case throws considerable light on the importance which the tribunals attach to warnings before dismissing an employee. In this case the tribunal took great pains to interpret the intention of the parties to the different site agreements, and it came to the conclusion that the agreed procedure was not followed. One other matter, which must be particularly noted by employers, is that where a final warning is required, this final warning must be “a warning”, and not the actual dismissal. So that where, for example, three warnings are to be given, the third must be a “warning”. It is after the employee has misconducted himself thereafter that the employer may dismiss.
Tom Copeland, Tim Roller and Jack Murrin
When the time comes to make a European acquisition or divestiture, you will be relieved to have this step‐by‐step guide to valuing a multinational business on hand. This article…
Abstract
When the time comes to make a European acquisition or divestiture, you will be relieved to have this step‐by‐step guide to valuing a multinational business on hand. This article, written from the point of view of a finance executive, is adapted from Valuation: Measuring and Managing the Value of Companies.
Thomas J. Kniesner and W. Kip Viscusi
The most enduring measure of how individuals make personal decisions affecting their health and safety is the compensating wage differential for job safety risk revealed in the…
Abstract
The most enduring measure of how individuals make personal decisions affecting their health and safety is the compensating wage differential for job safety risk revealed in the labor market via hedonic equilibrium outcomes. The decisions in turn reveal the value of a statistical life (VSL), the value of a statistical injury (VSI), and the value of a statistical life year (VSLY), which have both mortality and morbidity aspects that we describe and apply here. All such tradeoff rates play important roles in policy decisions concerning improving individual welfare. Specifically, we explicate the recent empirical research on VSL and its related concepts and link the empirical results to the ongoing examinations of many government policies intended to improve individuals' health and longevity. We pay special attention to recent issues such as the COVID pandemic and newly emerging foci on distributional consequences concerning which demographic groups may benefit most from certain regulations.
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Valrie Chambers and Anthony P. Curatola
Self-employed business owners are far less compliant in reporting and paying their taxes than wage earners (employees). Discounted utility theory suggests that people act…
Abstract
Self-employed business owners are far less compliant in reporting and paying their taxes than wage earners (employees). Discounted utility theory suggests that people act rationally and would not be willing to prepay an upcoming obligation. Mental accounting and behavioral economics theory take a different view, asserting that taxpayers will prefer a pay-as-you-go pattern (i.e., regularity). In response to these opposing theories, we conducted a behavioral experiment to see if a taxpayer who is given the opportunity to pay estimated federal income taxes monthly (instead of quarterly) will do so, and also whether they are less delinquent than those in the control group, who paid estimated federal income taxes quarterly. Our results indicate that when respondents were explicitly offered the opportunity to make monthly rather than only quarterly payments, the majority of the respondents opted to make monthly prepayments at least once. Additionally, those with an explicit option to pay as often as monthly rather than quarterly had significantly fewer dollars of delinquency. Paying more frequently could alleviate some budgeting pressures for the self-employed and result in fewer delinquencies to be collected at the federal level.
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I construct a set of dynamic macroeconomic models to analyze the effect of unskilled immigration on wage inequality. The immigrants or their descendants do not remain unskilled …
Abstract
I construct a set of dynamic macroeconomic models to analyze the effect of unskilled immigration on wage inequality. The immigrants or their descendants do not remain unskilled – over time they may approach or exceed the general level of educational attainment. In the baseline model, the economy's capital supply is determined endogenously by the savings behavior of infinite-lived dynasties, and I also consider models in which the supply of capital is perfectly elastic, or exogenously determined. I derive a simple formula that determines the time discounted value of the skill premium enjoyed by college-educated workers following a change in the rate of immigration for unskilled workers, or a change in the degree or rate at which unskilled immigrants become skilled. I compare the calculations of the skill premiums to data from the US Current Population Survey to determine the long-run effect of different immigrant groups on wage inequality in the United States.
Linda Wiper and David Longbottom
INTRODUCTION With the increasing importance of capital investment selection in modern business the field has attracted a large body of interest in the literature of the last two…
Abstract
INTRODUCTION With the increasing importance of capital investment selection in modern business the field has attracted a large body of interest in the literature of the last two decades. It is the purpose of the survey to trace this development from the use of simple financial criteria for assessing investments to the use of more sophisticated financial measures, techniques for assessing risk in investments and finally complex models for selecting portfolios of investments.
David S. Lee and Justin McCrary
Using administrative, longitudinal data on felony arrests in Florida, we exploit the discontinuous increase in the punitiveness of criminal sanctions at 18 to estimate the…
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Using administrative, longitudinal data on felony arrests in Florida, we exploit the discontinuous increase in the punitiveness of criminal sanctions at 18 to estimate the deterrence effect of incarceration. Our analysis suggests a 2% decline in the log-odds of offending at 18, with standard errors ruling out declines of 11% or more. We interpret these magnitudes using a stochastic dynamic extension of Becker’s (1968) model of criminal behavior. Calibrating the model to match key empirical moments, we conclude that deterrence elasticities with respect to sentence lengths are no more negative than
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Knight's Industrial Law Reports goes into a new style and format as Managerial Law This issue of KILR is restyled Managerial Law and it now appears on a continuous updating basis…
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Knight's Industrial Law Reports goes into a new style and format as Managerial Law This issue of KILR is restyled Managerial Law and it now appears on a continuous updating basis rather than as a monthly routine affair.