ABSTRACT
This paper proposes a formal model to assess the introduction of hydrogen technology in the air transport sector when the initial market is uncovered, a situation relevant to the current COVID-19 crisis. The "flight shame” movement causes some passengers to leave the market while allowing for some willingness-to-pay for cleaner technologies. Starting from a horizontally differentiated duopoly between airlines with old technology and an uncovered market, the introduction of hydrogen technology provides the opportunity for vertical differentiation in line with the increased environmental consciousness of passengers. The principal methodological novelties start from an uncovered market and combine horizontal and vertical differentiation. The main results are the airlines' optimal strategy sets and the adoption strategy dynamics with an increased valuation of quality by passengers. We justify a regulator's intervention and draw several potential policy implications from this dynamic, such as a minimum subsidy level and educational advertising. © 2022
ABSTRACT
Innovation is the main driving force of the sustainable development of enterprises. Economic policy uncertainty has increased dramatically in recent years due to events such as COVID-19, which will alter the business environment of enterprises and ultimately affect their innovation behavior. How economic policy uncertainty will affect corporate innovation has become a crucial topic, but empirical studies have not reached consistent conclusions, and few have noted the heterogeneity of different firms' perceptions of uncertainty. This study used a textual analysis approach to create firm-level economic policy uncertainty indicators from the texts of annual reports of Chinese A-share listed firms. Based on the effectiveness of our measure of economic policy uncertainty, we further examined its impact on firm innovation. We find that our uncertainty measure has negative effects on enterprise innovation activity, and this negative impact is more significant among non-state-owned enterprises, and firms with higher financial constraints and lower government subsidies. We extend the measurement of economic policy uncertainty from the micro level and provide some suggestions for policymakers at the macro level. In the period of increasing uncertainty in the external environment, the government should try to maintain the stability and transparency of economic policies, and provide more targeted policy support to enterprises, such as by broadening their financing channels and providing innovation subsidies. © 2023 by the authors.
ABSTRACT
The complexity of the EU carbon neutrality policy is addressed by evaluating the impacts of the interaction among different policy instruments. An energy-economic dynamic CGE model based on GTAP utilities is developed for simulating different policy scenarios starting from a business as usual case where the economic impacts related to the COVID-19 pandemic and recovery measures are included. The instruments tested as part of the EU climate strategy are the removal of fossil-fuel consumption subsidies, a carbon pricing mechanism and the public support to clean energy technologies. The modelling approach is based on a revenue recycling mechanism to finance clean energy technologies. We find that the simultaneous implementation of all instruments under the EU climate strategy including the removal of subsidies to fossil fuels and the reuse of revenues to foster the technological transition of the energy system is a win-win solution for a sustainable and decarbonised EU economy. © 2023 The Author(s)