GENERAL EQUILIBRIUM OF SPATIAL PRODUCT AND LABOR MARKETS*

ABSTRACT A simple general equilibrium model relates spatial product markets and spatial labor markets. The firm is treated as being a spatial monopolist or as a Löschian competitor in the output market and as a spatial monopsonist in the labor market. Derived free spatial demand and free regional labor supply are defined, and their properties examined. The model provides the framework for analyzing the impact of a technological improvement in labor productivity on the structure of the spatial markets. The impact of entry on spatial labor supply is an important determinant of whether or not entry lowers wages and raises output prices. Unlike the spaceless competitive paradigm, zero-profit long-run equilibrium can occur in a space economy under conditions of increasing returns to scale.     

Piaget in Africa: Some thoughts concerning operational thinking among the Iteso

Barnabus Otaala. The Development of Operational Thinking in Primary School Children: An Examination of Some Aspects of Piaget's Theory among the Iteso Children of Uganda. New York: Teachers College Press, 1973. ix + 118 pp. Tables, appendixes, and references. $3.95 (paper).     

Power,property, and preservation

MacKenzie, Melody Kapilialoha, ed. Native Hawaiian Rights Handbook. Honolulu: Native Hawaiian Legal Corporation, 1991. xi + 320 pp. including notes, glossary, table of cases, and index [distributed by University of Hawaii Press]. $25.00 paper.

Price, H. Marcus. Disputing the Dead: U.S. Law on Aboriginal Remains and Grave Goods. Columbia: University of Missouri Press, 1991. ix + 136 pp. including appendix and bibliography. $37.50 cloth.

West, Patrick C. and Steven R. Brechin, eds. Resident Peoples and National Parks: Social Dilemmas and Strategies in International Conservation. Tucson: University of Arizona Press, 1991. xxiv + 443 pp. including bibliography and index. $29.95 cloth.     

Nature and provenance of the sandstone used for Bayon style sculptures produced during the reign of Jayavarman VII

Under Jayavarman VII (1182/83-ca.1218 CE) the Khmer empire reached its apex, leaving a heritage of major construction works and unique artistic production. The stone materials of several sculptures produced under his reign were characterized and compared to possible geological sources in northern and eastern Cambodia. The data suggest that a specific type of sandstone, rich in volcanic detritus, was deliberately selected and quarried from a Triassic sedimentary sequence exposed far from Angkor, the main political and economic center at that time.     

The impact of playground design on play choices and behaviors of pre-school children

The purpose of this study was to examine where and how children choose to play in four Australian pre-school centers with very different outdoor playgrounds. Using a momentary time sampling direct observation instrument, a total of 960 scans were taken of pre-determined target areas (paths, paved expanses, grass, softfall, sand feature, manufactured functional, manufactured constructive and natural) within four playgrounds over a 30-day period. During each scan, we recorded the number of boys and girls observed in each target area as well as the dominant type of play (functional, constructive, symbolic, self-focused, talking). A total of 2361 observations of children occurred across the four centers. The results revealed the children were using the four playgrounds differently. At the diverse and natural Center A, the most popular space was the natural area and the least popular space was the sandpit. At the small, compact and diverse Center B, children were fairly evenly dispersed, with the most popular areas being the softfall and paved expanse. At the hard and barren Center C, almost half the children were found on the pavement, but the sandpits and natural areas were also popular. Finally, at the large, sparse and old Center D, children were fairly evenly dispersed, but most were observed playing on the softfall. Across all centers, irrespective of target area, the dominant play activity was functional play followed by self-focused play. This article discusses these findings and asks important questions about the design of pre-school playgrounds. In doing so, this study has begun to explain the relationship between the design of outdoor play spaces, children's choices of play locations and their play behaviors.