Canada's world share of science and social-science papers over the last five years, expressed as a percentage of papers in each of 22 fields in the   Thomson Reuters database. Also, Canada's relative citation impact compared to the world average in each field, in percentage terms.

Between 2003 and 2007, Thomson Reuters indexed 201,757 papers that listed at least one author address in Canada. Of those papers, the highest percentage appeared in journals classified under the heading of psychology/psychiatry, followed by ecology/environmental sciences and geosciences. As the right-hand column shows, the citations-per-paper average for psychology/psychiatry papers from Canada was 7% above the world average in the field (4.36 cites per paper for Canada versus 4.08 cites for the world). In all of the fields here save economics & business, the impact of Canadian research exceeded the world average, with particularly strong performance in space science (60% above the world average), clinical medicine (34% above), and physics (+33%).

SOURCE: National Science Indicators, 1981-2007 (containing listings of output and citation statistics for more than 170 countries; available in standard and deluxe versions from the Research Services Group).