INDUSTRIAL CENTERS AND REGIONAL GROWTH IN THE PRESENCE OF LOCAL INPUTS*

ABSTRACT. A large proportion of regional production takes place in nontraded goods and services. In addition, significant productivity increases can be observed in some segments of this sector. Starting from these two empirical observations we construct a model of growth in a two-region setting with factor mobility. The growth process is based on endogenous technological change in the nontraded input sector, whose output serves as an input in the production of one of the two final goods, the so-called industrial good. We consider two extreme cases, one with locally limited, the other with interregional knowledge spillovers. Conditions are established under which interior solutions with production of local inputs and steady-state growth in both regions result, and others under which we find a core-periphery pattern with growth concentrated in one region only. The stability of the equilibria is discussed by considering the transition processes. Finally, it is shown that catching-up as well as leapfrogging may occur, if new technologies become available.     

PRODUCTION FUNCTIONS AND THE DISAGGREGATION OF LABOR INPUTS IN MANUFACTURING PLANTS*

ABSTRACT. This paper investigates the assumption of homogeneous labor inputs underlying the production functions in many regional models. The results indicate that nonproduction and production labor within manufacturing plants are not strongly separable, and the homogeneous labor assumption is not therefore appropriate. Hence, regional models need to take this into account in order to give reliable results. Differences between industries provide useful additional insights into their labor and capital relationships.     

VARIETIES AND SOURCES OF ARTEFACTUAL OBSIDIAN IN THE MIDDLE STONE AGE OF THE MIDDLE AWASH,ETHIOPIA*

Recent investigation of the geochemical provenance of obsidian artefacts from spatially and temporally variable archaeological sites in Ethiopia has shown the diversity of geological sources and concomitant differences in the transport of raw material to archaeological sites, thus allowing reconstruction of the utilization of raw material by early hominids as well as recent humans. We recognize 30 compositionally different obsidians that were used at the Middle Stone Age (MSA) archaeological sites of Aduma (A8), Halibee Herto, Aladi Springs and Porc Epic in the Middle Awash region. Probable sources of nine of these obsidians are Adokoma, Ayelu, Ida'ale, Assebot, Asboli, Gira‐Ale and Kone. Many compositional types are confined to a single site, but others are shared between sites, although shared obsidians between sites more than 300 km apart are exceptional.     

GRAVITY AND SPATIAL STRUCTURE: THE CASE OF INTERSTATE MIGRATION IN MEXICO*

ABSTRACT The estimation of gravity models of internal (aggregate) place‐to‐place migration is plagued with endogeneity (omitted‐variable) biases if the unobserved effects of spatial structure are not accounted for. To address this econometric problem, this paper presents a more general specification of the gravity model, which allows for (bilateral) parameter heterogeneity across individual migration paths—along with (unilateral) origin‐ and destination‐specific effects. The resultant “three‐way fixed‐effects” (3FE) model is applied for an analysis of interstate migration in Mexico based on cross‐sectional data. To overcome parameter‐dimensionality problems (due to limited or incomplete information), the 3FE model is estimated using the Generalized Maximum Entropy (GME) estimator. The empirical implications of this new modeling strategy are illustrated by contrasting the 3FE‐GME estimates with those for the traditional and two‐way fixed‐effects (2FE) models. The former are far more plausible and intuitively interpretable than their traditional and 2FE counterparts, with parameter estimates changing in expected directions. The (average) effect of the migrant stock is markedly smaller than usually estimated, providing a more realistic measure of network‐induced migration. Migration outflows from centrally located origins have significantly steeper distance decay. Path‐specific distance effects exhibit directional asymmetries and spatial similarities.     

COMPOSITION VARIATIONS IN OBSIDIAN SOURCES AND THE ARCHAEOLOGICAL IMPLICATIONS*

An obsidian source can exhibit considerable variations in chemical composition. One such flow at Borax Lake in Lake County, California has been carefully investigated by neutron activation analysis of specimens from a number of different loci. It was found that the variable elements were completely coherent, and thus judgements concerning provenience could be just as definitive as with extremely homogeneous materials.     

COLLECTIVE CONSUMPTION AND URBAN SEGREGATION IN SOUTH AFRICA: THE CASE OF TWO COLORED SUBURBS IN THE JOHANNESBURG REGION

In South Africa, the provision of collective consumption and urban racial segregation have always been closely connected. This article examines changes in apartheid urban policy with specific reference to two predominantly working-class colored suburbs on the periphery of Johannesburg: Eldorado Park, begun in the mid-1960s during a period of relative growth and stability, is largely an expression of socialized housing produced by an interventionist state and construction of this suburb, despite its racially exclusive character, appears to fit all too well within the theory which sees collective consumption in terms of the reproduction of labor power. However the apartheid regime, confronted by a deepening economic and political crisis, later withdrew from the provision of collective consumption, and appears to be abandoning its racist urban policies and ideology. Thus construction of Ennerdale, beginning in the mid-1970s occurred within a context of privatization and austerity. Analysis of the apparent “deracialized” and market-oriented provision of urban goods and services in Ennerdale reveals, at a local level, contradictions of South African crisis policies.     

SPATIAL DIFFERENTIATION OF POPULATION DEVELOPMENT IN A DECLINING REGION: THE CASE OF SAARLAND

We increasingly understand the causes of population decline: these can be, among others, processes of deindustrialization, decreasing fertility or the succession of a city through the stages of urban life as the city matures. However, we are still insufficiently able to explain why differences still exist between cities within regions experiencing the same macro‐processes and between cities of the same “level of maturity”. This research addresses this intra‐regional differentiation in population development in the declining former mining region of Saarland (Germany). Quantitative and qualitative analysis reveals that the differentiation in current decline stems from (1) the differentiated population development trajectories of the past, with a massive population boom followed by an aged and declining population in the industrial municipalities; and (2) the spatial distribution of amenities over the region; and (3) the spatial distribution and accessibility of housing opportunities steering migration flows. The latter are not necessarily concentrated in those areas that are attractive. Rather, the distribution of these housing opportunities strictly follows the planning logic of the supra‐local institutional framework, with a concentration of housing within easy access of major transportation infrastructure and in larger centres. The case study thus reveals that the mechanisms behind this intraregional differentiation are much more complex than often portrayed in the urban development and decline debate.     

TAX COMPETITION IN THE PRESENCE OF INTERJURISDICTIONAL EXTERNALITIES: THE CASE OF CRIME PREVENTION*

ABSTRACT The paper analyzes the effect of fiscal competition when local governments choose the level of public goods that generate spillover effects elsewhere. For instance, law enforcement activities affect both the crime level in the jurisdiction providing the good and in neighboring communities. The model shows that when local governments rely on capital taxation to finance these expenditures the spillover effects may not lead to an inefficient provision of public goods as predicted by the tax competition literature. In the model, capital is costlessly mobile and offenders relocate responding to differential criminal opportunities and differential local law enforcement efforts.     

DISTRIBUTION AND CONTEXT OF WORKED CRYSTALLINE ARTIFACTS FROM THE MIDDLE CUMBERLAND REGION OF TENNESSEE

Antiquarian and modern explorations within the Middle Cumberland region of Tennessee have uncovered vast quantities of ceramic, stone, bone, and shell artifacts. Objects made from mineral resources represent a modest percentage of the overall artifact assemblage. Specimens manufactured from crystals comprise a very small portion of the mineral sample, as only six worked crystalline artifacts are documented to date for the Middle Cumberland region. These specimens of fluorite and calcite consist of four earplugs, one bird effigy pendant, and one bead from four different Mississippian period sites. Fluorite and calcite deposits occur within the study area, but additional research is needed to determine whether these sources were used to make the Middle Cumberland items. The recovery of three earplugs (two of which are very unusual) and raw calcite crystals from the Castalian Springs mound complex comprises intriguing evidence for the production of crystalline objects as a site activity.     

ACCESSING PAST BELIEFS AND PRACTICES: THE CASE OF LEMNIAN EARTH*

Lemnian Earth, a medicine in the shape of a stamped clay tablet (sphragis) from Lemnos, northeastern Greece, was much valued in antiquity and in the post‐medieval period as an antidote to poison and a treatment for other ailments. Although it was among the first archaeological materials to be subjected to chemical analysis (in 1807), there is still no clear understanding as to what made Lemnian Earth an effective medicine. We argue that Lemnian Earth, the artefact, was not the same as Lemnian Earth, the raw material. We suggest a composition for the artefact by scrutinizing the documentary evidence for its properties and by considering the geochemical processes that led to the formation of the raw material and the ritual relating to its extraction. The study of the latter highlights the need for archaeological materials scientists to recognize ritual as a possible manifestation of physical and chemical processes carried out within the framework of past beliefs and practices.