15,242 research outputs found
Lack of Health Care: A Root Cause of Homelessness
Close to 41.2 million people in the United States lacked health insurance for all of 2001. Extensive research exists on the effects of homelessness on health, but the high costs of health care as a cause of homelessness for low-income individuals have not been visibly examined. The loss and lack of health insurance places millions of adults and children in the position of being one accident or illness away from homelessness. A Commonwealth Fund study of loss of health insurance found that 40 percent of uninsured respondents had difficulty paying for basic necessities such as food, rent, and utilities as a result of high medical bills
The Futility of Utility: how market dynamics marginalize Adam Smith
Econometrics is based on the nonempiric notion of utility. Prices, dynamics,
and market equilibria are supposed to be derived from utility. Utility is
usually treated by economists as a price potential, other times utility rates
are treated as Lagrangians. Assumptions of integrability of Lagrangians and
dynamics are implicitly and uncritically made. In particular, economists assume
that price is the gradient of utility in equilibrium, but I show that price as
the gradient of utility is an integrability condition for the Hamiltonian
dynamics of an optimization problem in econometric control theory. One
consequence is that, in a nonintegrable dynamical system, price cannot be
expressed as a function of demand or supply variables. Another consequence is
that utility maximization does not describe equiulibrium. I point out that the
maximization of Gibbs entropy would describe equilibrium, if equilibrium could
be achieved, but equilibrium does not describe real markets. To emphasize the
inconsistency of the economists' notion of 'equilibrium', I discuss both
deterministic and stochastic dynamics of excess demand and observe that Adam
Smith's stabilizing hand is not to be found either in deterministic or
stochastic dynamical models of markets, nor in the observed motions of asset
prices. Evidence for stability of prices of assets in free markets simply has
not been found.Comment: 46 pages. accepte
Detector and Event Visualization with SketchUp at the CMS Experiment
We have created 3D models of the CMS detector and particle collision events
in SketchUp, a 3D modelling program. SketchUp provides a Ruby API which we use
to interface with the CMS Detector Description to create 3D models of the CMS
detector. With the Ruby API, we also have created an interface to the
JSON-based event format used for the iSpy event display to create 3D models of
CMS events. These models have many applications related to 3D representation of
the CMS detector and events. Figures produced based on these models were used
in conference presentations, journal publications, technical design reports for
the detector upgrades, art projects, outreach programs, and other
presentations.Comment: 5 pages, 6 figures, Proceedings for CHEP 2013, 20th International
Conference on Computing in High Energy and Nuclear Physic
Response to worrying trends in econophysics
This article is a response to the recent “Worrying Trends in Econophysics” critique written by four respected theoretical economists [1]. Two of the four have written books and papers that provide very useful critical analyses of the shortcomings of the standard textbook economic model, neo-classical economic theory [2,3] and have even endorsed my book [4]. Largely, their new paper reflects criticism that I have long made [4,5,6,7,] and that our group as a whole has more recently made [8]. But I differ with the authors on some of their criticism, and partly with their proposed remedy.General equilibrium; uncertainty; conservation laws; money nonconservation; nonintegrability of dynamical systems; financial markets; stochastic processes
Making dynamic modelling effective in economics
Mathematics has been extremely effective in physics, but not in economics beyond finance. To establish economics as science we should follow the Galilean method and try to deduce mathematical models of markets from empirical data, as has been done for financial markets. Financial markets are nonstationary. This means that 'value' is subjective. Nonstationarity also means that the form of the noise in a market cannot be postulated a priroi, but must be deduced from the empirical data. I discuss the essence of complexity in a market as unexpected events, and end with a biological speculation about market growth.Economics; fniancial markets; stochastic process; Markov process; complex systems
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