Sao Tome and Principe | Import product concentration index

This indicator reflects the Herfindahl-Hirschmann index measure of the degree of import concentration within a country. The sectoral Hirschmann index is defined as the square root of the sum of the squared shares of exports of each industry in total exports for the region under study. Takes a value between 0 and 1, with 1 indicating that only a single product is exported. Higher values indicate that imports are concentrated in fewer sectors. On the contrary, values closer to 0 reflect a more equal distribution of market shares among importers. Note that this type of concentration indicator tends to be quite vulnerable to cyclical fluctuations in relative-prices, in a way that commodity price rises make commodity importers look more concentrated.
Publisher
The World Bank
Origin
Sao Tome and Principe
Records
53
Source
Sao Tome and Principe | Import product concentration index
1960
1961
1962
1963
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1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
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1993
1994
1995 0.09172012
1996 0.09689206
1997 0.44058147
1998 0.44058147
1999 0.44572976
2000 0.12908236
2001 0.17049504
2002 0.15377146
2003 0.12507722
2004 0.15605692
2005 0.20344049
2006 0.18275544
2007 0.18480001
2008 0.20679652
2009 0.14400589
2010 0.15074777
2011 0.09034529
2012

Sao Tome and Principe | Import product concentration index

This indicator reflects the Herfindahl-Hirschmann index measure of the degree of import concentration within a country. The sectoral Hirschmann index is defined as the square root of the sum of the squared shares of exports of each industry in total exports for the region under study. Takes a value between 0 and 1, with 1 indicating that only a single product is exported. Higher values indicate that imports are concentrated in fewer sectors. On the contrary, values closer to 0 reflect a more equal distribution of market shares among importers. Note that this type of concentration indicator tends to be quite vulnerable to cyclical fluctuations in relative-prices, in a way that commodity price rises make commodity importers look more concentrated.
Publisher
The World Bank
Origin
Sao Tome and Principe
Records
53
Source