The findings of the reports would be analysed once the final report is submitted, Commerce and Industry Minister Nirmala Sitharaman said in a written reply to the Rajya Sabha.
"The government assigned to Indian Council for Research on International Economic Relations (ICRIER) to conduct a study on revisiting SEZs," she said.
So far, the government has approved 565 SEZ proposals out of which 388 zones have been notified and only 185 are exporting.
SEZ has emerged as a major exporting and investment hub started losing sheen after imposition of minimum alternate tax (MAT) and dividend distribution tax (DDT) in 2011.
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Industry had asked the government to roll-back the MAT on SEZs. They had said that the levy has suppressed the potential of these zones as a tool to promote exports and generate employment.
In 2011, government had imposed 18.5 per cent MAT on book profits of special economic zone developers and units.
Although government last year announced an incentive package to revive these zones, several developers have surrendered their projects as imposition of taxes has eliminated the incentives for setting up SEZs and units in those zones.
Exports from these zones stood at Rs 4.94 lakh crore in 2013-14.
While presenting the Budget 2014-2015, Finance Minister Arun Jaitley had said that the government is committed to revive SEZs and make them effective instruments of industrial production, economic growth, export promotion and employment generation.
Replying to another question, the minister said the negotiations for Indian-Israel free trade agreement are under way.
"India is aiming to achieve a mutually beneficial and balanced FTA with Israel," she added.
No deadline has been set for concluding the pact.