The theme of these notes, in general, is the population dynamics of evolutionaryprocesses, and, in particular, a number of accounting concepts that are central to anyunderstanding of processes of evolution of the variation and selective retention kind.The accounting concepts I use are naturally...

This paper illustrates the application of functional-equations results in population ethics.In an intertemporal framework, we provide characterizations of several classes of variablepopulationsocial orderings that may depend on individual lengths of life in addition tolifetime utilities...

We analyze the rationalizability of variable-population social-choice functions in a welfaristframework. It is shown that xed-population rationalizability and a weakening ofcongruence together are necessary and suffcient for rational choice, given a plausible dominanceproperty that prevents the...

[...]What explains New York’s ongoing ability to dominateAmerica’s urban landscape? In this paper, we explore theeconomic history of the city and argue that three themesemerge. First, New York’s emergence as the nation’s premier port was not the result of happenstance followed by...

[...]This paper builds primarily on research on agglomerationeconomies. Much of the empirical work on agglomeration hassought to estimate the effect on productivity of anestablishment’s local environment. The estimation hassometimes involved direct estimates of productivity(Henderson 2003) and...

[...]This paper empirically examines the spatial and temporalresponses of the New York City economy to a large, butspatially concentrated, exogenous shock to its capital stock:the terrorist attacks of September 11, 2001. Our focus on thecity’s response allows us to draw inferences about how...

[...]The focus of my remarks is something else entirely. Mypurpose is threefold: first, to make the case that the study ofhistory is essential to understanding the present and future ofany urban area; second, to suggest that in terms of age, size,density, and demographic patterns, New York has...

It has become a truism to say that immigration hastransformed American society since 1965. Beginning with“gateway” cities like New York and Los Angeles, the effect ofnew immigrants now extends to small pork- or chickenprocessingtowns in Iowa or North Carolina. Indeed, theMarch 2004 annual...

[...]This paper examines the operation of the U.S. labor marketin the 2001 recovery. Because the United States is in the middleof the recovery, ours is a real-time analysis; thus, someconclusions could change if the recovery stalls or employmentgrows suddenly. For instance, since August 2003,...

New York City is well-known for the special challenges itfaces in providing the largest urban population in theUnited States with quality affordable housing. The city’shousing problems are frequently the subject of intense debate.It is sometimes said that housing problems in New York Cityare...