Boethius and the Block Universe: Physical and Metaphysical Considerations of Time

In this exploration of the nature of time, the author shows that more than a superficial belief in a creator God invites the person of faith to engage with some of the unsettling questions presented by modern physics and cosmology. He considers how human beings study and measure time, and he also treats how we experience time as creatures \"caught\" in its passage, and the emotions evoked by that experience. The various possible paths of the future of the universe are provocative subjects for theological treatment

Scattering amplitudes from finite-volume spectral functions

A novel proposal is outlined to determine scattering amplitudes from finite-volume spectral functions. The method requires extracting smeared spectral functions from finite-volume Euclidean correlation functions, with a particular complex smearing kernel of width $\epsilon$ which implements the standard $i\epsilon$-prescription. In the $L \to \infty$ limit these smeared spectral functions are therefore equivalent to Minkowskian correlators with a specific time ordering to which a modified LSZ reduction formalism can be applied. The approach is presented for general $m \to n$ scattering amplitudes (above arbitrary inelastic thresholds) for a single-species real scalar field, although generalization to arbitrary spins and multiple coupled channels is likely straightforward. Processes mediated by the single insertion of an external current are also considered. Numerical determination of the finite-volume smeared spectral function is discussed briefly and the interplay between the finite volume, Euclidean signature, and time-ordered $i\epsilon$-prescription is illustrated perturbatively in a toy example.Comment: 22 pages, 2 figures, CERN-TH-2019-035, CP3-Origins-2019-006 DNRF9

Continuing Conflict

A relatively small but growing literature in economics examines conflictive activities where agents allocate their resource endowments between wealth production and appropriation. To date, their studies have employed a one period, static game theoretic framework. We propose a methodology to extend this literature to a dynamic setting, modeling continuous conflict over renewable natural resources between two rival groups. Investigating the system’s steady states and dynamics, we find two results of general interest. First, Hirshleifer’s “paradox of power” is self-correcting. Second, if productive activities cause damage to disputed resources, the introduction of a small amount of conflictive activity enhances social welfare.Conflict, Dynamics, Paradox of Power, Renewable Resources

Conflict and Renewable Resources

The economic literature on conflict employs a static game theoretic frame- work developed by Jack Hirshleifer. We extend this literature by explicitly introducing conflict dynamics into the model. Our specific application is based on two stylized facts. First, conflict often arises over scarce renew- able resources, and second those resources often lack well-defined and/or enforceable property rights. Our stylized model features two rival groups, each dependent on a single contested renewable resource. Each period, the groups allocate their members between resource harvesting and resource appropriation (or conflict) in order to maximize their income. This leads to a complex non-linear dynamic interaction between conflict, the two populations, and the resource. The system's steady states are identified and comparative statics are computed. As developed, the model relates most closely to conflict over renewable resources in primitive societies. The system's global dynamics are investigated in simulations calibrated for the historical society of Easter Island. The model's implications for contemporary lesser developed societies are examined.Conflict, Dynamics, Renewable Resources

Some studies of complexes of transition metals with heterocyclic ligands

Imperial Users onl

Corporate Social Responsibility and the Environment: A Theoretical Perspective

We survey the growing theoretical literature on the motives for and welfare effects of corporate greening. We show how both market and political forces are making environmental CSR profitable, and we also discuss morally-motivated or altruistic CSR. Welfare effects of CSR are subtle and situation-contingent, and there is no guarantee that CSR enhances social welfare. We identify numerous areas in which additional theoretical work is needed.corporate social responsibility, environment, self-regulation, preemption, private politics

POLICIES AND PROCEDURES USED FOR GRANTING IRRIGATION PERMITS IN SELECTED UPPER MIDWESTERN STATES

Agricultural and Food Policy,

Environmental Inspection Proclivity and State Manufacturing Growth: The US Experience from the 1990s

In this paper we construct a ranking of states based on their proclivity to inspect facilities for environmental compliance. Our measure utilizes state-level inspections data supplied by the US Environmental Protection Agency. After developing our ranking, we use it to predict state-level growth in manufacturing establishments. In doing so, we find support for the notion that enforcement intensity adversely impacts such growth. Our results offer insight into why existing studies that examine the impact of environmental regulation on location and growth produce inconsistent results.Monitoring and Enforcement, Environmental Regulations, Business Formation Growth

Astroturf: Interest Group Lobbying and Corporate Strategy

We study three corporate nonmarket strategies designed to influence the lobbying behavior of other special interest groups: (1) astroturf, in which the firm covertly subsidizes a group with similiar views to lobby when it normally would not; (2) the bear hug, in which the firm overtly pays a group to alter its lobbying activitives; and (3) self-regulation, in which the firm voluntarily limits the potential social harm from its activities. All three strategies reduce the informativeness of lobbying, and all reduce the payoff of the public decision-maker. We show that the decision-maker would benefit by requiring the public disclosure of funds but that the availability of alternative strategies limits the impact of such a policy.