منابع مشابه
The Effect of Immigration on Productivity: Evidence from US States
Using the large variation in the inflow of immigrants across US states we analyze the impact of immigration on state employment, average hours worked, physical capital accumulation and, most importantly, total factor productivity and its skill bias. We use the location of a state relative to the Mexican border and to the main ports of entry, as well as the existence of communities of immigrants...
متن کاملReconsidering US Immigration Reform: The Temporal Principle of Citizenship
The uncertain political status of America's millions of undocumented immigrants and their children has exposed deep and ongoing disagreement about how US citizenship should be accorded to foreign-born persons. I identify the principle of jus temporis, a law of measured calendrical time, that has worked in concert with jus soli and consent to construct citizenship law since the nation's founding...
متن کاملDendrochronology and Geochemistry of Long Island Trees
To help understand the effect of short term climatic changes on ring width variations of trees on Long Island, time series were performed on 6 Liriondendrin tuliperfera (tulip poplars) and 1 white oak from Caumsett State Park, and 6 Pinus rigidas (pitch pines) from Sears Bellows and Hubbard County Parks. Prolonged drought periods on Long Island occur during years 1927-1932, 1960-1970 and 1980-1...
متن کاملWeb-Based Tools for Teaching Dendrochronology
This article describes two web-based tools for teaching dendrochronology, the scientific study of tree rings, and presents quantitative evaluations of their value in a large class. Because of its wide scientific applicability, dendrochronology is appropriate for teaching in a wide array of courses, including those in the fields of natural resources and life sciences. Until recently, professors ...
متن کاملLured in and crowded out? Estimating the impact of immigration on natives’ education using early XXth century US immigration
Immigration can impact educational decisions of natives through two different margins. First, it can increase the potential returns to education by generating a larger supply of unskilled workers, thus raising the relative wages of more educated individuals. Secondly, it can increase the cost of acquiring education through crowding out natives of public schools. We separate these two channels b...
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ژورنال
عنوان ژورنال: Information Visualization
سال: 2019
ISSN: 0142-5471,1569-979X
DOI: 10.1075/idj.25.1.01cru