Economies at early stages of development are often shaken by abrupt changes in growth rates, whereas in advanced economies growth rates tend to be relatively stable. To explain this pattern, we propose a theory of technological diversification. Production makes use of different input varieties, which are subject to imperfectly correlated shocks. Technological progress takes the form of an incre...

Lipid analysis is a well-established field of research that focuses on one lipid or a few lipids. The recent developments in mass spectrometry technologies have enabled more comprehensive studies to be performed on lipids present in a sample. The move towards extensive lipid research has led to the coining of the term lipidomics, which is defined as the ensemble of lipids present in a sample. I...

The United States is in the midst of a technological revolution, driven in large part by rapid advances in microelectronics. There has been much speculation about the impacts of the “information superhighway” on society as a whole, but surprisingly little is known about the potential effects of this technology revolution on the spatial distribution of jobs and people either broadly or in urban ...

This paper considers a technological change that can be utilized only by production units adapting to the new technology. A simple firm dynamics model is used to show such an innovation enhances reallocation, whereas a technological advance that is available to all production units does not. This implication is used in structural vector autoregressions to study the driving force behind cyclical...

We estimate the rate of embodied technological change directly from plant-level manufacturing data on current output and input choices along with histories on their vintages of equipment investment. Our estimates range between 8 and 17 percent for the typical U.S. manufacturing plant during the years 1972-1996. Any number in this range is substantially larger than is conventionally accepted wit...

C. Merle Crawford is a professor of marketing at the University of Michigan at Ann Arbor; Gerard J. Tellis, formerly a sales development manager for Johnson & Johnson, is a research assistant and Ph.D. candidate at Michigan. This exhaustive listing and classification of the literature and arguments on technological innovation contributes toward the discussion of an issue vital to the United Sta...

Steel industry is one of the leading industries in the world. Today it is also one of the fundamental and strategic industries of the world. Per capita production and consumption amount of steel are used as a criterion for evaluation of country development. Furthermore, attention to technological innovations is assumed so much crucial to access the international markets of steel industrie...

Let Z+, where d is an integer, denote the positive integer d-dimensional lattice points. The notation m≺ n, where m= (m1,m2, . . . ,md) and n= (n1,n2, . . . ,nd) ∈ Z+, means that mi ≤ ni, 1 ≤ i≤ d, |n| is used for ∏d i=1ni. Gut [2] proved that if {X ,Xn, n∈ Z+} is a d-dimensional array of i.i.d. random variables with E|X|p <∞ (0 < p < 2) and EX = 0 if 1 ≤ p < 2, then ∑ j≺nXj |n|1/p −→ 0 in L p ...

We find the minimal real number k such that the kth power of the Fourier transform of any continuous, orbital measure on a classical, compact Lie group belongs to l2. This results from an investigation of the pointwise behaviour of characters on these groups. An application is given to the study of Lp-improving measures.