1. Economic Infrastructure Stocks and Investment in South Africa, 1870 – 2000

2. 1. ECONOMIC INFRASTRUCTURE, ITS PERFORMANCE AND ECONOMIC GROWTH
Infrastructure comprises activities that share technical features (including economies of scale) and economic features (such as externalities). It includes activities which are not directly productive but which are necessary for the development of productive activities.
Infrastructure comprises both economic and social infrastructure

3. Barro’s (1990) model of endogenous growth demonstrates that an important attribute of infrastructure expenditure by the public sector is that it raises the marginal product of other capital used in the production process, although only up to a point.
Empirical estimates of the impact of infrastructure on economic growth vary widely

4. What accounts for the performance of infrastructure (a particular issue in Africa)?
1. delivery of infrastructure services usually occurs within a market structure where competition is absent 2. the agencies charged with responsibility for delivering infrastructure are seldom given the managerial and financial autonomy they need to perform 3. actual users of the infrastructure are not positioned to make their demands felt

5. Converging forces are opening up new opportunities for innovation in infrastructure delivery:
Advances have occurred in technology and in its regulatory environment which have introduced more competition
A growing awareness of the necessity for a larger private sector role in infrastructure delivery and management.
Greater concern exists for environmental sustainability and poverty reduction and this is providing impetus for infrastructure reform

6. 3. Trends in economic infrastructure in SA
Long-term decline infrastructure spending & savings
Late 1990s: Telkom, Eskom, SAA

7. Rising government consumption expenditure
Rising government consumption expenditure financed by investment cutbacks and borrowing

8. Correlation for : 0.6
Negative correlation for (-0.26)

9. Existence of long-run relationships between GDP and infrastructure (INF) can be tested using Pesaran, Shin and Smith (PSS) F-tests
Estimate the following equation:
Compute F-statistic for joint significance of d1 = d2 = 0 and compare with critical values; F>FI(1) indicates INF affects GDP (d1 = d2 = 0 is rejected); F<FI(0) indicates INF does not affect GDP; FI(0) < F < FI(1): inconclusive
Repeat with DINFt on LHS; RHS unchanged

10. Measure of infrastructure
The PSS F-statistics indicate forcing relationships from
infrastructure investment to GDP and from infrastructure
fixed capital stock to GDP.
Table 1: PSS F-tests for the relationship between real GDP and infrastructure
investment and infrastructure fixed capital stock (“INFR”)
Measure of infrastructure
Relationship between GDP per capita
and INFR per capita
GDP as outcome variable; * indicates GDP determined by INFR
INFR as outcome variable; * indicates INFR determined by GDP
Infrastructure investment
6.39 *
0.88
Infrastructure fixed capital stock
7.69 *
2.78

11. Early rail development closely related to mining
Average growth rate : 8.5% p.a.
“Plateau” effect from 1930

12. Downturn in actual numbers from early 1980s
F-tests: GDP ↔ locomotives (actual)
F-tests: GDP → coaching stock (actual)

13. F-tests: GDP → freight (pc/actual) F-tests: GDP → passengers (actual)
Strong positive association
F-tests: GDP → freight (pc/actual)
F-tests: GDP → passengers (actual)

14. Strong positive association
F-tests: Road → GDP (actual)
ARDL results indicate paved roads → GDP

15. Slow / negative growth from mid-1980s…
…but not the sharp decline experienced by rail
F-tests (actual): passenger vehicles → GDP; goods vehicles ↔ GDP

16. Strong growth in late 1970s: Richards Bay &
Strong growth in late 1970s: Richards Bay & Saldanha; growing trade in 1990s
F-tests: GDP → cargo (actual)

17. Strong positive association
F-tests: indicate GDP → SAA passengers (actual)

18. Generally positive relationship except for 1989 - 1993
F-tests: GDP → passengers (pc & pc/actual, unclear actual)

19. F-tests: GDP → fixed lines (actual & pc/actual)
Puzzling slowdown in 1960s (when GDP growth was strong)

20. Cross-country correlations of 0. 94 (fixed lines) and 0
Cross-country correlations of 0.94 (fixed lines) and 0.91 (mobile lines)
SA phone lines pc appears low (esp. fixed)

21. Power failures affect other infrastructure: lights, rail & air etc
Power failures affect other infrastructure: lights, rail & air etc. (North America in Aug 2003)
F-tests: GDP → elec. (pc & pc/actual); also ↔ actual

22. Cross-country correlation of 0.86 SA in line with other countries

23. Phases of Infrastructure Development

24. Conclusion
The relationship between economic infrastructure and economic growth appears to run in both directions. Economic growth provides both the need for, and the resources to fund.
SA’s stock of economic infrastructure has developed in phases.
The need for investment in economic infrastructure never goes away.

25. Conclusion (policy implications)
Monitor growing pressures on existing infrastructure-related goods and services when GDP rises – identify congestion and wear & tear
Respond to bottlenecks through investment, since aggregate infrastructure investment has a positive impact on long-run GDP
In some cases (no bottlenecks), plateau effects may be desirable (but maintenance remains important)
Recently: improvement in infrastructure investment and GDP growth. The big question is how this investment drive is going to be sustained when our savings rate is still so low. 

26. Appendix – infrastructure developments
New trains (15-year programme); Gautrain
New aeroplanes (Airbus)
New airport (La Mercy)
New port (Coega)
Upgraded facilities at existing ports & airports
Roads – various projects (including expanded public works programme)
Fixed phone lines: SNO (?)
Electricity – remains a concern, but growing level of awareness; a global problem?