Qualitative mismatches arise when the qualifications or skills of workers, individually or in the aggregate, are different from the qualifications or skills required or specified for their jobs. This review develops the distinction between short run mismatches occurring between workers and jobs and long run aggregate mismatches that arise from shifts in supplies and demands for workers. The rev...

in population genetics. Mathematical analysis has shown how different evolutionary processes interact, and statistical methods have made it possible to interpret observations and experiments. The availability of computing power and the flood of genomic data have made quantitative methods even more prominent in recent years. Although we largely avoid explicit mathematics in Evolution, mathematic...

qualitative and quantitative research methods are different in some aspects but they complement each other in other aspects, as well. following widespread criticism of qualitative and quantitative research methods, there is increasing trend in using mixed research methods in social sciences in general and political science in particular. most advocates of pluralism attempted to fill the gap bet...

This is a progress report on our efforts to design intelligent robots for complex environments. The sort of applications we have in mind include sentry robots, autonomous delivery vehicles, undersea surveillance vehicles, and automated warehouse robots. We are investigating the issues relating to machine learning, using multiple mobile robots to perform tasks such as playing hide-and-seek, tag,...

We give new proofs of soundness (all representable functions on base types lies in certain complexity classes) for Elementary Affine Logic, LFPL (a language for polytime computation close to realistic functional programming introduced by one of us), Light Affine Logic and Soft Affine Logic. The proofs are based on a common semantical framework which is merely instantiated in four different ways...

We assume a database consists of records of individuals with private or sensitive fields. Queries on the distribution of a sensitive field within a selected population in the database can be submitted to the data center. The answers to the queries leak private information of individuals though no identification information is provided. Inspired by decision theory, we present two quantitative mo...

Our understanding of the function of dendrites has been greatly enriched by an inspiring dialogue between theory and experiments. Rather than functionally ignoring dendrites, representing neurons as single summing points, we have realized that dendrites are electrically and chemically distributed nonlinear units and that this has important consequences for interpreting experimental data and for...