To answer these questions, we analysed a data set of 249 National Highway road public-private partnership (PPP) projects of which 77 were completed. Results showed that after accounting for other factors, political factors are indeed strongly associated with the success of PPP projects, the modus operandus of choice for infrastructure development over the past decade. But, surprisingly, not always in the way we thought it would.
An interesting feature of these projects is the substantial divergence in cost and time overruns. For example, in our data set of projects, the time overrun varied from (-)29.73 per cent to 133.33 per cent, indicating that some projects were completed ahead of schedule. Similarly, the cost overrun varied from (-)29.58 per cent to 155.40 per cent, indicating that some projects were completed within or below budget.
Our findings showed that political factors impact time overruns more than cost overruns. Cost overruns in PPPs can often lead to monetary gains for the private sector at the cost of the taxpayer, but the political set-up seems to be equipped to minimise such overruns. We are not saying that cost overruns do not occur in PPP projects, but that political factors seem to play a limited role. Our results also indicate that time overruns need not lead to cost overruns.
We considered two factors that reflected the political environment. The first was whether the ruling parties in the state government (SG) and the central government (CG) were the same or part of an alliance or whether they were different. The second was whether there has been a change in the SG during the development of the project.
Thillai Rajan is Associate Professor, Department of Management Studies IIT Madras, email: thillair@iitm.ac.in;
Nandita Vadali is a graduate in infrastructure engineering, IIT Madras
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