Specialization and concentration: A note on theory and evidence

A Note on Belief Structures and S-approximation Spaces

We study relations between evidence theory and S-approximation spaces. Both theories have their roots in the analysis of Dempsterchr('39')s multivalued mappings and lower and upper probabilities, and have close relations to rough sets. We show that an S-approximation space, satisfying a monotonicity condition, can induce a natural belief structure which is a fundamental block in evidence theory...

A Perfect Specialization Model for Gravity Equation in Bilateral Trade based on Production Structure

Although initially originated as a totally empirical relationship to explain the volume of trade between two partners, gravity equation has been the focus of several theoretic models that try to explain it. Specialization models are of great importance in providing a solid theoretic ground for gravity equation in bilateral trade. Some research papers try to improve specialization models by addi...

A NOTE ON STRATIFIED LM-FILTERS

We develop a theory of stratified $LM$-filters which generalizes the theory of stratified $L$-filters. Our stratification condition explicitly depends on a suitable mapping between the lattices $L$ and $M$. If $L$ and $M$ are identical and the mapping is the identity mapping, then we obtain the theory of stratified $L$-filters. Based on the stratified $LM$-filters, a general theory of lattice-v...

A Reflection on Research, Theory, Evidence-based Practice, and Quality Improvement

The Making of a New Medical Specialty: A Policy Analysis of the Development of Emergency Medicine in India

Background Medical specialization is an understudied, yet growing aspect of health systems in low- and middleincome countries (LMICs). In India, medical specialization is incrementally, yet significantly, modifying service delivery, workforce distribution, and financing. However, scarce evidence exists in India and other LMICs regar...