General purpose technologies (GPTs) are drastic innovations, such as electrification, the transistor, and the Internet, that are characterized by the pervasiveness in use, innovational complementarities, and technological dynamism. The model develops a two-country (Home and Foreign) dynamic...

Since around 2000, U.S. aggregate productivity growth has slowed and product market (sales) concentration has risen. At the same time, productivity differences among firms in the same sector appear to have risen dramatically. In this paper I propose a rich model of competition and innovation to...

This paper focuses on the optimal operation of the islanded microgrid. A novel heuristic method known as the Multiobjective Evolutionary Algorithm Based on Decomposition is presented to search for the optimal solution with a fast response. The efficiency of the method is tested on the IEEE 33...

The concept of the circular economy has gained well-recognition across the world for the past decades. With the heightening risk of the impact of climate change, resource scarcity to meet the increasing world population, the need to transition to a more sustainable development model is urgent....

Since around 2000, U.S. aggregate productivity growth has slowed and product market (sales) concentration has risen. At the same time, productivity differences among firms in the same sector appear to have risen dramatically. Sector-level data shows correlations between rising productivity gaps,...

We explore several possible avenues which have driven the rise in aggregate U.S. health-services prices since the mid-twentieth century. Our multi-sector general equilibrium model is structural change meets health macro, featuring endogenous population aging, market concentration in the health...

Over the past decades, private R&D spending in the US and other developed countries has been growing faster than GDP. At the same time, the growth rates of per capita and aggregate output have been rather stable, possibly declining slightly. This paper proposes a growth model that can account...

Since around 2000, U.S. aggregate productivity growth has slowed and product market concentration has risen. To explain these facts, I construct a measure of innovativeness based on patent data that is comparable across firms and over time and show that small firms make innovations that are more...

Since the 1980s, the labour demand has shifted toward more educated workers in the US. The most common explanation is that the productivity of skilled workers has risen relative to the unskilled, but it is not easy to explain why the aggregate labour productivity was stagnant during the 1980s....

The goal of this study is to contribute to the debate on the role of government spending in shaping the growth process. We take the analysis in three new directions. First, we investigate the role of government spending in a scale-invariant Schumpeterian model of endogenous innovation. Second,...