Correction to: Do exchange rate changes have threshold effects on the trade balance? Evidence from Tunisia

Testing green fiscal policies for green investment, innovation and green productivity amid the COVID-19 era

“…A zero-cost renewable energy source chosen according to the above DEA model has a total investment efficiency of 10%, a scaling efficiency of 100% and a pure technological efficiency of 10%. We use the incentives and tax rebates of chosen clean energy developers to help explain their resulting financial performance (Ben Doudou et al 2020). The scale of the renewable energy firms, their equity allocation and returns on their investments are crucial to the future of the sector.…”