Many countries and governments consider smart cities a solution to global warming, population growth, and resource depletion. Numerous challenges arise while creating a smart city. Digital twins, along with the Internet of Things, fifth-generation wireless systems, blockchain, collaborative...

Whether command-control environmental regulation can play a positive role in circumstances of imperfect market incentive-based environmental regulation remains rarely explored. Using the difference-in-difference model, we find that command-control environmental regulation can significantly...