A Database of World Stocks of Infrastructure: 1950-2005
A Database of World Stocks of Infrastructure: Update 1950-2005
David Canning and Mansour Farahani
Harvard School of Public Health
September 2007
This data is an update of Canning (1998). Details of definitions and data construction can be found there. We give the infrastructure data set constructed by Canning (1998) together with the infrastructure data from the World Bank’s World Development Indicators 2006. The data sets are merged to give our best estimates of infrastructure over the period 1950-2005. The World Bank usually does not give any figures for infrastructure before 1980. Canning (1998) only goes up to 1995, so that by combining the two datasets we get a longer time series. We also report the ratio and difference between the two series. For telephones the agreement in the two series is almost always close to perfect and we do not report ratios and differences. In some cases the series match perfectly but with a one year lag; this may occur if the reporting date is the end of the year for one dataset and the beginning of the year for the other. In this case we lag one series by a year to give a match when the datasets overlap.
We use the two series to construct a new merged infrastructure data set for the period 1950-2005. When, as is common, the ratio is one, or the difference is zero, between the series for the overlap years (or very close to these figures) we simply use the Canning data to fill in missing observations in the World Bank series. When the ratio is close to one or the difference is close to zero we use adjust the Canning data multiplied by a proportionality factor to match the World Bank Data for the overlap years. When the series match in some years but not others we use a year in which they match to generate overlap.
The missing World Bank data is then filled in using the adjusted Canning data. When the two series disagree substantially we report only the data set we think is more consistent, or in some cases neither data set, in the merged data set. When we have only one data source this is reported in the merged data.
Railways
Length of Rail Line, kilometers
Railline: World Bank (2006) data
Railwork: data from Canning (1998)
Railratio:railline/ railwork
Raildif: railline – railwork
Railmerge: new estimates
Roads
Length of Paved Road, kilometers
Pavedroad: data from Canning (1998)
Paved: World Bank (2006) data
Roaddif: Pavedroad-Paved
Roadratio: Pavedread/paved
Roadmerge: new estimates
Telephones
Telephone main lines
Mainline: data from Canning (1998)
Phone: World Bank (2006) data, constructed as mainlines per capita times population
Telephonemerge: new estimates
Electricity Generating Capacity
Electricity Generating Capacity, 1000 kilowatts
Egc: data from Canning (1998)
Eleccap: World Bank (2006) data
Elecdif: Egc- Eleccap
Elecratio: Egc/Eleccap
Egcmerge: new estimates
References
When using this dataset please reference: Canning, David, “A Database of World Stocks of Infrastructure: 1950-1995,” The World Bank Economic Review, 1998, Vol. 12, pp 529-548.
and
World Bank, World Development Indicators 2006, World Bank, Washington DC.
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