<u>Table 4:</u> Means and Medians Analysis in Growth

|<br>Variable|<br>stats|<br>Avg|<br>. Annual Gro|<br>wth|<br>Ann|ual Diff in gr|owth|T-stat (<br>in mean|Z-stat) for di<br>s(medians)|fference<br>ingrowth|
|---|---|---|---|---|---|---|---|---|---|---|
|||Preprivat|Transition|Postprivat|(2)-(1)|(3)-(2)|(3)-(1)|(2)-(1)<br>|(3)-(2)<br>|(3)-(1)<br>|
|||(1)|(2)|(3)|(4)|(5)|(6)|(7)|(8)|(9)|
|**Outputs**|||||||||||
|Residential|mean|4.3%|5.5%|3.4%|1.3%|-2.8%|-0.8%|-1.787**|3.590***|1.976**|
|Connections|p50<br>|4.4%<br>|4.7%|3.2%<br>|0.4%|-1.7%|-1.0%|-1.456|5.116***|2.366**|
||sd|2.6%|5.5%|2.0%|||||||
||N|79|84|60|79|60|56||||
|MWH sold|mean<br>|6.7%<br>|6.7%<br>|3.2%<br>|-0.5%<br>|-5.0%<br>|-3.2%<br>|0.616<br>|3.085***<br>|3.362***<br>|
|per year|p50<br>|6.6%<br>|5.9%<br>|2.8%<br>|-0.7%|-2.9%|-2.7%|0.708|4.096***|3.159***|
||sd|4.5%|8.7%|4.7%|||||||
||N|74|85|57|74|57|51||||
|**Inputs**|||||||||||
|Number of|mean|-6.6%|-9.9%|-2.1%|-3.2%|9.7%|2.1%|2.056*|-5.398***|-1.519*|
|Employees|p50|-6.1%|-9.0%|-1.8%|-3.8%|8.7%|4.0%|2.306**|-4.505***|-1.776*|
||sd|8.1%|10.0%|4.8%|||||||
||N|53|69|44|53|44|32||||
|**Efficiency**|||||||||||
|Connections|mean|13.4%|18.4%|5.5%|4.2%|-16.4%|-4.2%|-1.813**|5.691***|2.183**|
|per employee|p50<br>|11.1%<br>|14.0%<br>|5.6%<br>|4.5%|-10.6%|-3.5%|2.333**|4.975***|2.300**|
||sd|12.6%|16.8%|5.1%|||||||
||N|53|66|43|53|43|32||||
|GWH per|mean|15.1%|20.3%|5.5%|3.7%|-19.9%|-6.7%|1.426*|6.539***|2.826***|
|employee|p50|12.8%|15.0%|4.0%|3.0%|-16.4%|-6.3%|-1.624|5.084***|3.011***|
||sd|13.5%|16.9%|7.6%|||||||
||N|53|66|43|53|43|32||||
|Distributional|mean|0.6%|-5.5%|-1.3%|-4.7%|6.4%|-2.0%|3.301***|-3.474***|0.960|
|losses|p50|0.1%|-4.9%|-0.1%|-4.5%|6.5%|-1.5%|3.317***|-2.944***|0.786|
||sd|7.8%|10.2%|9.6%|||||||
||N|57|73|46|57|46|36||||
|**Quality**|||||||||||
|Duration of|mean|4.1%|-9.8%|-3.8%|-11.2%|3.4%|-10.5%|1.788*|4.476***|5.122***|
|Interruptions|p50|-5.2%|-12.9%|-3.2%|-7.0%|8.5%|-5.1%|2.132**|-0.749|0.711|
|per year|sd|31.6%|25.7%|24.8%|||||||
|per consumer|N|32|51|26|32|26|11||||
|<br>Frequency of|mean|2.7%|-10.6%|-11.4%|-11.1%|-2.9%|-17.8%|1.653*|0.378|3.093***|
|Interruptions|p50|-5.0%|-10.8%|-6.6%|-2.8%|-2.4%|-14.4%|1.664*|-0.165|2.490**|
|per year|sd|29.0%|20.3%|20.5%|||||||
|per consumer|N|32|51|26|32|26|11||||
|**Coverage**|||||||||||
|Residential|mean|2.0%|2.2%|1.9%|0.4%|-1.0%|-0.6%|-0.903|1.702**|0.780|
|Connections|p50|1.5%|1.9%|1.3%|0.4%|-0.9%|-0.3%|-1.408|3.186***|0.619|
|per 100 HHs|sd|3.9%|3.0%|3.6%|||||||
||N|65|76|50|65|50|42||||
|**Prices**|||||||||||
|Avg Tariff per|mean|9.3%|-3.3%|2.0%|-15.2%|4.3%|-11.4%|6.251***|-'1.821**|3.172***|
|<br>residential GWH|p50|9.7%|-6.3%|0.1%|-15.1%|1.3%|-13.1%|5.329***|-1.442|2.785***|
|(in dollars)|sd|160%|90%|141%|||||||
||N|.<br>59|.<br>86|.<br>57|59|57|35||||
|Avg Tariff per|mean|10.2%|2.0%|0.6%|-7.8%|0.2%|-12.3%|4.744***|-0.172|4.899***|
|residential GWH|p50|5.9%|2.3%|1.8%|-5.3%|0.9%|-9.7%|4.454***|-0.734|4.063***|
|(in real local|sd|12.6%|7.3%|7.9%|||||||
|currency)|N|59|86|56|59|56|35||||

* significant at 10%; ** significant at 5%; *** significant at 1%

# _A. Output_

The first output indicator, number of connections, had important increases during the three periods: Levels of residential connections showed a 20.2% increase from the pure public to the transition period, and a 16.7% increase from transition to pure private. But a closer look at the results shows a clearly positive trend that would exist in the absence of a change in ownership. In terms of growth rates, residential connections’ growth increased by 1.3 percent points during the transition, from it average annual growth rate of 4.3% during the first period, but then growth _14 of 28_