Competition between highway operators: Can we expect toll differentiation?*

Coronary angioplasty--what can we reasonably expect?

How long can we expect to live?

Female Most developed world regions. Both sexes Least developed countries. Both sexes 1950 50.7 53.4 66.5 35.5 1955 53.9 56.8 68.5 37.7 1960 56.9 60.0 69.8 39.6 1965 59.5 62.7 70.5 41.8 1970 61.4 65.0 71.2 43.6 1975 62.9 66.8 72.2 45.2 1980 64.4 68.5 73.0 47.1 1985 65.7 70.1 74.0 49.3 1990 66.4 70.8 74.2 49.7 1995 67.0 71.4 74.9 52.6 Source: World Population Prospects: The 1996 Revision. United...

How We Can Improve Our Highway Administration

My remarks on the subject of “How We Can Improve Our Highway Administration” will be confined to certain important areas where improvements can and must be effected if highway administra­ tion is to measure up to the responsibilities of today. To a large extent this discussion will be based upon observations and experience in Wis­ consin, where the highway department has gone through a period o...

[Can we expect polymorphisms to answer our questions?].

We have read with great interest the article by Rodríguez Rodrigo et al1 describing the dramatic case of a patient whose only risk factor was moderately elevated homocysteine values associated with heterozygosis of the 5,10-methylenetetrahydrofolate reductase gene, in the course of a hypercoagulable situation as is the puerperium. An association between high concentrations of homocysteine and i...

How Large an Effect Can We Expect from School Reforms?

How Large an Effect Can We Expect from School Reforms? Judging the success of school reform requires an interpretative context in which to judge whether effects obtained are large enough to be important or so small as to be a disappointment. The logic of school reform suggests two frameworks with which to judge the importance of effects. One is the size of the existing achievement gaps between ...