| Perkins et al. (2005a) |
Air travel series: SAA passengers (SSA, SATS, SAA) and international passengers at South African airports (SSA) |
c.1950-2001 |
Proxy for air transport infrastructure, in the absence of a direct measure. |
| Perkins et al. (2005a) |
Electricity generated series (US, SSA) |
1920-2002 |
Gigawatt-hours generated used for growth rates and PSS tests. |
| Perkins et al. (2005a) |
NATIS (National Traffic Information System) and SSA vehicle registration data |
1920-2002 |
Numbers of passenger and goods vehicles used for traffic growth rates and PSS tests. |
| Perkins et al. (2005a) |
National Ports Authority cargo data (with OYBU, SSA) |
1911-2001 |
Cargo handled in harbour tons used as a proxy for port infrastructure capacity and in PSS tests. |
| Perkins et al. (2005a) |
Road data: OYBU, US, SSA, CSIR, SANRA (total and paved national and provincial roads) |
1920-2001 |
Builds road length series for Table 4, Fig. 3 and the PSS tests, with interpolation for 1994-2000. |
| Perkins et al. (2005a) |
Telephone line data: OYBU, Canning (1998), Telkom, Vodacom |
1912-2003 |
Fixed and mobile line series for growth rates and PSS tests; 1934-1960 interpolated. |
| Perkins et al. (2005b) |
CSIR, SANRA and NATIS road and vehicle data |
1920-2002 |
Series for total and paved road distance and for passenger and goods vehicle numbers; paved series for 1994-2000 interpolated. |
| Perkins et al. (2005b) |
Eskom and Union Statistics/SSA electricity generation data; DBSA (1998) history of electricity |
1920-2003 |
Electricity generated series and Eskom capacity and peak demand figures supporting the electricity trend and capacity warning. |
| Perkins et al. (2005b) |
National Ports Authority data and Ports of Southern Africa and Mauritius (Young, 2003) |
1911-2001 |
Cargo handled in harbour tons, used as a proxy for port capacity; Durban Container Terminal congestion reported. |