scholarly journals New evidence for a long Rhaetian from a Panthalassan succession (Wrangell Mountains, Alaska) and regional differences in carbon cycle perturbations at the Triassic-Jurassic transition

2022 ◽  
Vol 577 ◽  
pp. 117262
Author(s):  
A.H. Caruthers ◽  
S.M. Marroquín ◽  
D.R. Gröcke ◽  
M.L. Golding ◽  
M. Aberhan ◽  
...  
1980 ◽  
Vol 40 (2) ◽  
pp. 281-308 ◽  
Author(s):  
Jeremy Atack ◽  
Fred Bateman ◽  
Thomas Weiss

In spite of the importance accorded the steam engine during nineteenth-century industrialization, little is known about its rate of diffusion and the determinants thereof in the United States. The primary purpose of this paper is to enhance our knowledge about the spread of this technology. New evidence on steam power use in 1820, 1850, and 1860, combined with published census data from 1870, permits quantitative estimates of the regional variations in timing, pace, and extent of usage before 1900. Second, we advance reasonable conjectures for the regional differences that appear. Although lack of evidence precludes a definitive delineation of causality, with simulation techniques we are able to use the limited evidence available on costs to reconcile, albeit imperfectly, the historical pattern with economic-theoretic predictions regarding the process of innovation.


2017 ◽  
Vol 154 ◽  
pp. 10-22 ◽  
Author(s):  
Gwénaël Caravaca ◽  
Christophe Thomazo ◽  
Emmanuelle Vennin ◽  
Nicolas Olivier ◽  
Théophile Cocquerez ◽  
...  

Cliometrica ◽  
2021 ◽  
Author(s):  
Pim de Zwart

AbstractThis paper adds to a growing literature that charts and explains inequality levels in pre-industrial societies. On the basis of a wide variety of primary documents, the degree of inequality is estimated for 32 different residencies, the largest administrative units and comparable to present-day provinces, of late colonial Indonesia. Four different measures of inequality (the Gini, Theil, Inequality Extraction Rate and Top Income Rate) are employed that show consistent results. Variation in inequality levels across late colonial Indonesia is very large, and some residencies have much higher levels of inequality (with, for example, Ginis above 60) than others (with Ginis below 30). This suggests that even within a single colony, levels of inequality may vary substantially and this puts some doubts on the representativeness of using a single number to capture the level of inequality in a large economy. In order to explain the variation across residencies and over time, this paper investigates the role of exports and plantations, so frequently mentioned in the literature. It is shown that both explain a part of the variation in levels of inequality across colonial Indonesia, but that only the rise of plantations can explain changes in inequality levels over time. This points to the importance of the institutional context in which global export trade takes place for the rise of inequality.


2000 ◽  
Vol 57 (S2) ◽  
pp. 1-4 ◽  
Author(s):  
Richard Carignan ◽  
Robert J Steedman

This Supplement presents data syntheses and new evidence from temperate (primarily boreal) North American studies of aquatic ecosystem response to episodic watershed deforestation and acid rain. These studies confirm the dominant role of the watershed in modulating aquatic response to terrestrial disturbance and quantify important regional differences related to physiography, vegetation, and drainage patterns. Comparisons of watershed disturbance by wildfire and logging revealed both similarities and differences in aquatic impact and underscore the need for ongoing regional evaluation of forest management models based on simulation of natural disturbance patterns. General quantitative impact models are now available but tend to be regional in scope and relevant primarily to water yield and water quality, rather than to habitat and biota.


1978 ◽  
Vol 48 ◽  
pp. 31-35
Author(s):  
R. B. Hanson

Several outstanding problems affecting the existing parallaxes should be resolved to form a coherent system for the new General Catalogue proposed by van Altena, as well as to improve luminosity calibrations and other parallax applications. Lutz has reviewed several of these problems, such as: (A) systematic differences between observatories, (B) external error estimates, (C) the absolute zero point, and (D) systematic observational effects (in right ascension, declination, apparent magnitude, etc.). Here we explore the use of cluster and spectroscopic parallaxes, and the distributions of observed parallaxes, to bring new evidence to bear on these classic problems. Several preliminary results have been obtained.


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