Financing Cities

The macro-economic and micro-economic evidences makes a persuasive case for cities as important centers for productive efficiency, innnovation, and economic growth. For cities to achieve their full economic potential, however, complementary public services are required. This paper reviews the arguments and the evidence for the efficient financing and governance of city public services. Against the criterion of efficiency, city services should be limited to those services valued by city residents; financing should assign residential taxes to residential services and business land taxes and fees to business services; and city governance should foster competition and choice.

The Funding Status of Teacher Pensions: An Econometric Approach

The financing of public employee pensions has become an issue of growing public concern. This paper examines the fundinq status of teacher pension plans for the fifty states and for selected localities for the decade, 1971-1980. A pension underfunding equation based upon actuarial principles is specified and estimated using a sample of pension plans for which actuarially sound measures of underfundings are available. The ecometrically-estimated pension equationis then used to "predict" underfundings for each state and local pension plan for each year for which full pension plan data are available. The results reveal that the real dollar value of plan underfundings has risen by over 50% in the average state from 1971-1980. Strategies for funding these growing pension deficits are required.

Lab Retriever: a software tool for calculating likelihood ratios incorporating a probability of drop-out for forensic DNA profiles.

BackgroundTechnological advances have enabled the analysis of very small amounts of DNA in forensic cases. However, the DNA profiles from such evidence are frequently incomplete and can contain contributions from multiple individuals. The complexity of such samples confounds the assessment of the statistical weight of such evidence. One approach to account for this uncertainty is to use a likelihood ratio framework to compare the probability of the evidence profile under different scenarios. While researchers favor the likelihood ratio framework, few open-source software solutions with a graphical user interface implementing these calculations are available for practicing forensic scientists.ResultsTo address this need, we developed Lab Retriever, an open-source, freely available program that forensic scientists can use to calculate likelihood ratios for complex DNA profiles. Lab Retriever adds a graphical user interface, written primarily in JavaScript, on top of a C++ implementation of the previously published R code of Balding. We redesigned parts of the original Balding algorithm to improve computational speed. In addition to incorporating a probability of allelic drop-out and other critical parameters, Lab Retriever computes likelihood ratios for hypotheses that can include up to four unknown contributors to a mixed sample. These computations are completed nearly instantaneously on a modern PC or Mac computer.ConclusionsLab Retriever provides a practical software solution to forensic scientists who wish to assess the statistical weight of evidence for complex DNA profiles. Executable versions of the program are freely available for Mac OSX and Windows operating systems

Federal Assistance and Local Services in the United States: The Evolution of a New Federalist Fiscal Order

The federalist fiscal structure of the United States has been evolving steadily towards the centralization of the financing of government services and transfers. Revenues are raised centrally and then transferred, via grants-in-aid, to state and local governments. This paper seeks to explain this movement towards centralized financing. Two alternative hypotheses are examined. The first--that aid is allocated to correct market or political failures in the local public economy or to equalize the provision of meritorious local public goods--generally fails to account for the distribution of federal aid over the past thirty years. The second hypothesis--that aid is allocated to ease the fiscal pressure in the state- local sector when, and only when, it is in the political interests of Congressional representatives to do so--is supported by the recent data. Our current system of federal grants to state and local governments is a logical outcome of a Congressional budget process that rewards the centralized financing and the localized provision of public good and services.

Fiscal Federalism in Europe: Lessons From the United States Experience

The existing political and legal institutions of fiscal policy-making are under challenge. As the United States and the eastern European and Soviet states experiment with policy decentralization, the states of western Europe are looking to a more centralized policy structure via the E.E.C.. This paper seeks to raise issues of importance to all such reform efforts--notably, the need to consider, and balance, the inefficiencies of fiscal policy decentralization (spillovers and wasteful fiscal competition) against the inefficiencies of fiscal policy centralization (policy cycles and localized 'pork barrel' spending and taxes). The need to develop new fiscal policy institutions emphasizing voluntary agreements and responsive 'agenda-setters' is stressed.

Candidate proof mass actuator control laws for the vibration suppression of a frame

The vibration of an experimental flexible space truss is controlled with internal control forces produced by several proof mass actuators. Four candidate control law strategies are evaluated in terms of performance and robustness. These control laws are experimentally implemented on a quasi free-free planar truss. Sensor and actuator dynamics are included in the model such that the final closed loop is self-equilibrated. The first two control laws considered are based on direct output feedback and consist of tuning the actuator feedback gains to the lowest mode intended to receive damping. The first method feeds back only the position and velocity of the proof mass relative to the structure; this results in a traditional vibration absorber. The second method includes the same feedback paths as the first plus feedback of the local structural velocity. The third law is designed with robust H infinity control theory. The fourth strategy is an active implementation of a viscous damper, where the actuator is configured to provide a bending moment at two points on the structure. The vibration control system is then evaluated in terms of how it would benefit the space structure's position control system

The Political Economy of Fiscal Policy

If there has been a dominant trend in the evolution of the modern industrial societies of this century it has been the growing importance of government in the allocation of social resources. It is important that we appreciate the fundamentally political nature of the formation of government economic policy. This survey reviews and assesses our present understanding of how the political system might shape a nation's fiscal policy. Our approach is eclectic, drawing both from economics and political science, and decidedly micro-analytic in its orientation. From economics we adopt the perspective of utility maximizing agents and the analytics of trade, agreement, and market failure. From political science we learn just how and when these individual agents might act collectively to provide public goods, redistribute income, or issue government debt. Together the micro-analytics of economics and political science form the core theory of the 'new' political economy and provide a framework for understanding the emergence, and the performance, of governments. There is no more important test for the new discipline than providing a compelling explanation for the formation of fiscal policy in democratic societies.