Low-energy dynamics in the unit-charge sector of the CP 1 model on spherical space (space-time S 2 × R) is treated in the approximation of geodesic motion on the moduli space of static solutions, a six-dimensional manifold with non-trivial topology and metric. The structure of the induced metric is restricted by consideration of the isometry group inherited from global symmetries of the full fi...

This paper shows that stricter enforcement may increase tax evasion. Individuals vote on a linear income tax which is used to finance lump sum transfers. Stricter enforcement may make redistributive taxation more attractive to the decisive voter. The tax rate and transfer may rise which in turn may increase tax evasion. An example shows that this result can actually occur. The paper also discus...

We develop a model of education where individuals face educational risk. Successful graduation depends on individual effort to study and public resources. After realization of risk, they either work as skilled or as unskilled worker. We show that an optimal public policy consists of tuition fees combined with skill-contingent loans, lump-sum transfers/taxes, and public funding of the educationa...

In this paper we propose a three–level computational equilibrium model that allows to analyze the impact of the regulatory environment on transmission line expansion (by the regulator) and investment in generation capacity (by private firms) in liberalized electricity markets. The basic model analyzes investment decisions of the transmission operator (TO) and private firms in expectation of an ...

Slotting allowances are a relatively recent trend, particular to the retail food industry. These allowances are lump-sum, up-front transfer payments from manufacturer to retailer when the manufacturer launches a new product. The practice has attracted some scrutiny because of uncertainty about its purposes and consequences. We draw from the extant literature to identify factors that potentially...

The effect of linear lumping, linear transformation to reduce the number of state variables on controllability and observability of linear differential equations has been studied. Controllability of the original system implies the controllability of the lumped system. Examples taken from reaction kinetics illustrate our results.

This article introduces a social planner version of a model central to the New Economic Geography for explicitly answering whether the symmetric equilibrium outcome of the decentralized market economy is socially desirable. We find that savings incentives are too weak, resulting in an inefficiently low capital stock and therefore an inadequate number of product varieties. The optimal subsidy an...

Article history: Received 24 January 2011 Received in revised form 3 August 2011 Accepted 3 August 2011 Available online 10 August 2011 This paper analyzes tax competition for foreign direct investment with country risk using a two-country model with different market sizes. We show that the trade-off between country size as a locational advantage and country risk as a locational disadvantage af...

An inchworm robotic insect is presented that can displace on a smooth horizontal surface. It consists of a piezoelectric unimorph and two custom-designed limbs. A two-module lumped-parameter model is formulated to assist in the desigdanalysis process. The geometry of deformation is analyzed first by superimposing the unirnorph ’s elastic deformation to a rigid-body rotation around the limb/grou...