General purpose technologies (GPTs) like AI enable and require significant complementary investments. These investments are often intangible poorly measured in national accounts. We develop a model that shows how this can lead to underestimation of productivity growth new GPTs early years and, later, when the benefits harvested, overestimation. call phenomenon Productivity J-curve. apply our me...

An adequate computer model of the process rolling flange details with inclined rolls has been built in software package DEFORM-3D. The analysis stress-strain state a detail was performed. rheological properties alloy L63 (62-65% Cu, 34.5-38% Zn) were experimentally studied. Value limits Cockcroft-Latham fracture criterion for are determined.

This essay analyzes the long-term lessons of the recent upturn and downturn in the telecommunications industry. It concludes that volatility and cyclicality will be an inherent part of the telecom sector in the future. To deal with such instabilities, companies and investors seek consolidation and cooperation. Government, too, is likely to stress stability more than before. Hence, an oligopoly ...

The fact that both the Lorenz 1963 and 1969 models suggest finite predictability is well known. However, less known mechanisms (i.e., sensitivities) within models, which lead to predictability, are different. Additionally, mathematical physical relationship between these two has not been fully documented. New analyses, along with a literature review, performed here provide insights regarding si...

BACKGROUND The role of advanced glycation end products (AGEs) in the development of diabetes, especially diabetic complications, has been emphasized in many reports. Accumulation of AGEs in the vasculature triggers a series of morphological and functional changes in endothelial cells (ECs) and induces an increase of endothelial permeability. This study was to investigate the involvement of RhoA...

We provide a framework and evidence to confront two contradictory yet common assertions: (1) new technology such as the Internet favors businesses in urban areas and (2) the Internet reduces the importance of distance for economic activity. Controlling for other factors, we show that participation in the Internet is more likely in rural areas than in urban areas. This is particularly true for t...

This paper examines the effect of international outsourcing of intermediate inputs on labour productivity at the level of the plant that engages in outsourcing. To do so we use plant level data for the electronics industry in the Republic of Ireland. Using a fresh perspective on international outsourcing and productivity, we focus on the nature of outsourced inputs (services or tangibles) and t...

Data on assignees of patenters are used to analyze the mobility of semiconductor inventors. A model of the entry and staffing of spinoffs of incumbent producers is developed to explain the higher mobility of semiconductor inventors in Silicon Valley. Exploiting data on the origins of semiconductor producers with larger sales, we argue that the greater mobility of semiconductor inventors in Sili...

Technology and industry structure are intertwined in complicated ways. So complicated that little research has been carried out on this subject. One of the few dogmas within the field is that rapid technological change is conducive to change in industry structure. This paper analyzes a case for which this proposition does not hold. The investigated industry is a technologically vigorous sector ...