Showing 1 - 10 of 909
This paper proposes a new approach to the "factor zoo" conundrum. Instead of applying dimension-reduction methods to a large set of portfolios obtained from sorts on characteristics, I construct factors that summarize the information in characteristics across assets and then sort assets into...
Persistent link: https://www.econbiz.de/10014372475
This paper proposes latent factor models for multidimensional panels called 3D-PCA. Factor weights are constructed from a small set of dimension-specific building blocks, which give rise to proportionality restrictions of factor weights. While the set of feasible factors is restricted, factors...
Persistent link: https://www.econbiz.de/10014512115
knowledge acquisition (A), implementing written knowledge management rules (W). The French 1998-2000 Community Innovation Survey …
Persistent link: https://www.econbiz.de/10012468456
The pace of innovation is related both to the level of investment in innovation and the pool of knowledge from which … and design of IPR affects the extent to which any innovation adds to or subtracts from the pool of ideas that are … lead to a lower pace of innovation, and more generally, that long run effects may be the opposite of the short run effects …
Persistent link: https://www.econbiz.de/10012458650
We examine the rise of dark shipping - oil tankers disabling AIS transceivers to evade detection - amid Western sanctions on Iran, Syria, North Korea, Venezuela, and Russia. Using a machine learning-based ship clustering model, we track dark-shipped crude oil trade flows worldwide and detect...
Persistent link: https://www.econbiz.de/10015326479
Sparse models, though long preferred and pursued by social scientists, can be ineffective or unstable relative to large models, for example, in economic predictions (Giannone et al., 2021). To achieve sparsity for economic interpretation while exploiting big data for superior empirical...
Persistent link: https://www.econbiz.de/10014322811
which governments shape innovation, and dwarf all other public subsidies for innovation. We examine the impact of government …
Persistent link: https://www.econbiz.de/10012480426
the U.S. Air Force Small Business Innovation Research (SBIR) program that transitioned from "Conventional topics," which … innovation even in less specific Conventional topics. The results suggest that government (and perhaps private sector) innovation …
Persistent link: https://www.econbiz.de/10012510578
This chapter reviews academic research on the connections between agglomeration and innovation. We first describe the … conceptual distinctions between invention and innovation. We then describe how these factors are frequently measured in the data …, industrial diversity) that theoretical and empirical work link to innovation, and we discuss factors that help sustain these …
Persistent link: https://www.econbiz.de/10012458300
This paper reviews recent academic work on the spatial concentration of entrepreneurship and innovation in the United … identify and discuss policies that are being pursued in the United States to encourage local entrepreneurship and innovation …
Persistent link: https://www.econbiz.de/10012459649