Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Erika Rasure is globally-recognized as a ...

Social Choice and Welfare, Vol. 6, No. 4 (1989), pp. 259-273 (15 pages) This paper is concerned with sequences of policies that occur over time in voting models and planning procedures. The framework ...

Biological systems that perform multiple tasks face a fundamental trade-off: A given phenotype cannot be optimal at all tasks. Here we ask how trade-offs affect the range of phenotypes found in nature ...