A condition for openness

A COMMUTATIVITY CONDITION FOR RINGS

In this paper, we use the structure theory to prove an analog to a well-known theorem of Herstein as follows: Let R be a ring with center C such that for all x,y ? R either [x,y]= 0 or x-x [x,y]? C for some non negative integer n= n(x,y) dependingon x and y. Then R is commutative.

A Necessary Condition for Weyl-Heisenberg Frames

Metrics for openness

The characterisation of scholarly communication is dominated by citation-based measures. In this paper we propose several metrics to describe different facets of open access and open research. We discuss measures to represent the public availability of articles along with their archival location, licences, access costs and supporting information. Calculations illustrating these new metrics are ...

Trade openness, capital openness and government size

This paper provides empirical evidence of the relation between trade openness, capital openness and government expenditures in a cross-sectional time-series context. It is shown that capital openness is significantly and negatively related to government expenditures in line with the conventional wisdom that capital mobility may undermine the ability of governments to maintain larger public sect...

Constructing a New Monetary Condition Index for Iran

Reliable measures of the size and direction of changes in monetary policy are very crucial for examining the effects of monetary policy on the economy. Monetary Condition Index (MCI) can be used as a tool to assess the stance of monetary policy. This index is defined as the weighted average of different monetary transmission mechanism relative to their values in a base period. The weights in MC...