According to the System of National Accounts, the output of transportation is measured by the value of the amounts receivable for transporting goods or persons. In economics a good in one location is recognised as having a different quality from the same good in another location, so that transporting from one location to another is a process of production in which an economically significant transformation takes place even if the good remains otherwise unchanged. The transport and communications sector consists of the following sub-sectors: 1) rail transport; 2) road transport; 3) water transport; 4) air transport; and 5) communications. In this appendix the data sources and raw statistical data are given for these sub-sectors, which are subsequently used to estimate time-series in value added.

Rail transport

The prime source for the reconstruction of railway transport in the framework of the national accounts is Statistiek van het vervoer op de spoorwegen en tramwegen met machinale beweegkracht in Nederlandsch-Indië, Batavia, 1900-1914, and Verslag betreffende het spoor- en tramwegwezen in Nederlandsch-Indië, Batavia, 1915-1930. These are combined with:

• • Jaarcijfers voor het Koninkrijk der Nederlanden. Koloniën. The Hague, 1897-1921;

• • Statistisch Jaaroverzicht van Nederlandsch-Indië. Batavia, 1922-1940;

• • Koloniaal Verslag, The Hague, 1849-1930;

• • Indisch Verslag, The Hague, 1931-1940.

Information on number of passengers, goods transported, total revenues and net profits was obtained from the above listed sources. Estimates on the cost structure are obtained from annual reports of railway enterprises mentioned in the text (i.e. SS, DSM, and NISM):

• • Jaarverslag der n.v. Deli Spoorweg Maatschappij, Amsterdam, 1883-1940;

• • Verslag over den aanleg en de exploitatie van de Staatsspoorwegen in Nederlandsch- Indië, Batavia, 1887-1915;

• • Verslag der Staatsspoor- en tramwegen in Nederlandsch-Indië, Batavia, 1915-1941;

• • Verslag van den raad van beheer der Nederlandsch-Indische Spoorweg Maatschappij aan de algemeene vergadering van aandeelhouders, The Hague, 1869-1929;

• • Verslag n.v. Nederlandsch-Indische Spoorweg Maatschappij, The Hague, 1930-1940.

• • ARA, inv. 2.20.11, Deli Spoorweg Maatschappij, 1883-1970;

• • ARA, inv. 2.20.10, Nederlandsch-Indische Spoorweg-Maatschappij, 1863-1973.