Sub-Saharan Africa excluding South Africa | 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
Sub-Saharan Africa excluding South Africa
Records
53
Source
Sub-Saharan Africa excluding South Africa | Import product concentration index
1960
1961
1962
1963
1964
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
1992
1993
1994
1995 0.05070165
1996 0.05604261
1997 0.05236126
1998 0.05087177
1999 0.05169444
2000 0.06498532
2001 0.05973001
2002 0.05692297
2003 0.05531064
2004 0.06825578
2005 0.06672356
2006 0.07992006
2007 0.08105214
2008 0.09359126
2009 0.0740995
2010 0.08135641
2011 0.0845207
2012

Sub-Saharan Africa excluding South Africa | 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
Sub-Saharan Africa excluding South Africa
Records
53
Source