Modeling Categorical Data with Chi Square Automatic Interaction Detection and Correspondence Analysis

For the past decade we have been concerned with the application of categorical data techniques to mobility and housing choice. In a previous issue of this journal we reviewed a number of these modeling techniques. We now extend that earlier work by introducing correspondence analysis as a geometric interpretative technique that fits in an intermediate position between CHAID and nested logit analysis. The method is illustrated on the same housing and tenure choice data as was used in the previous paper.     

Housing Choice in a Regulated Market: A Nested Multinomial Logit Analysis

The paper integrates several important elements of the institutionalized and regulated nature of the housing market and analyzes the relationship between household type and housing choice in Vienna within a nested multinomial logit framework. In particular, the concept of household specific choice sets is used to account for institutional, informational and income-based constraints of the choice process. Government subsidies (such as housing and rent allowances, non-interest-bearing state loans) are explicitly taken into account in the definition of variables. Housing choice is considered in three stages: the choice of a dwelling unit given dwelling type and residential zone, the choice of a dwelling type given residential zone, and the marginal choice of a residential zone. The coefficients are derived by means of a sequential ML-procedure. The empirical results clearly indicate that demographic variables have significant impacts on housing choice behavior. Income as a single explanatory variable as well as its interacting with size measures and the quality of the house are found to be important criteria for dwelling unit choice, as housing cost variables for dwelling type choice behavior. The dwelling unit and dwelling type choice submodels fit reasonably well, whereas the residential zone model is less successful.     

The Vernacular Gasoline Station: Examples from Illinois and Wisconsin

Vernacular gasoline stations, those designed jointly by contractor and owner, have not shared in the recent attention directed to gasoline stations as landscape features. Instead, that growing attention has been directed largely to stations designed by architects. This study, based on extensive field survey and intensive interviews, demonstrates that the remaining vernacular gasoline stations in Illinois and Wisconsin are manifestations of special places and time, rural and small town settings between 1925 and 1940. Vernacular designing was conditioned by an uncritical reference to an archetypal gasoline station form rather than to a profit-minded manipulation of imagery. As a result, the vernacular stations were integral parts of their environments and they remain prominent landscape features clearly communicating their origins. The vernacular emphasis on form recommends the future study of the gasoline station as an architectural ensemble.     

Modeling Micro-Spatial Employment Location Patterns: A Comparison of Count and Choice Approaches

This article studies employment location patterns in the Puget Sound Region of Washington State at a micro level of geography. Traditional discrete choice modeling using multinomial logit (MNL) models may be problematic at a micro level of geography due to the high dimensionality of the set of alternative locations and the likely violations of the independence from irrelevant alternatives (IIA) assumption. Count models are free from the IIA assumption and, unlike logit models, actually benefit from large numbers of alternatives by adding degrees of freedom. This study identifies the best-fitting count model as the zero-inflated negative binomial (ZINB) model, because this model more effectively addresses the large number of cells with no jobs and reflects a dual process that facilitates the identification of threshold clustering effects such as those found in specialized employment centers. The estimation and prediction results of ZINB are compared with those of MNL with a random sampling of alternatives estimated on an equivalent data set. The ZINB and MNL models largely agree on major trends, with the ZINB model providing more insightful details, but with less capacity to predict large count situations.     

Planning for Rural Housing in the Republic of Ireland: From National Spatial Strategies to Development Plans

This paper examines the role of spatial planning as a policy framework for managing rural housing within an integrated territorial development strategy. The paper focuses on the Republic of Ireland, which provides a useful case for analysing spatial planning and rural housing relationships, due to the State's recent shift towards spatial planning (formalized with the publication of the Irish National Spatial Strategy), as well as the level of housing construction that has been observed in an increasingly post-productivist countryside (triggered by counter-urbanization flows, increased affluence and demands for second holiday homes, etc.). The paper reviews all policy instruments that have been used to manage rural housing at various scales (from national strategies to local level development plans). It is argued that while spatial planning adopts an integrative vocabulary, as policy moves down the spatial scale hierarchy, multi-dimensional spatial goals are implemented through traditional, narrow land-use regulation. This often leads to rural housing being addressed in isolation from its wider social and economic context, disconnecting housing from wider rural community issues and ultimately failing to deliver a coordinated and coherent spatial policy for managing rural settlements.     

Land Tenure and Food Security: Exploring Dynamic Linkages

Land tenure and food security have each been the subject of extensive—but generally separate—research in the past. Links between the two issues are now receiving increased attention, yet critical links between them remain unexplored. After a brief review of the two concepts, this article combines both issues within a dynamic framework that recognizes not just the conventional link between access to land and access to food in the short run, but also the recursive link between access to food and the ability to maintain sufficient resources to meet long-run needs. Such a framework makes explicit the trade-offs that poor households may face in bad years between consumption and investment in non-labour assets. Perhaps less intuitively, it also suggests that the need for self-insurance may force poor households to choose less efficient crops or production strategies than wealthier households even in good years. The article concludes with a discussion of the implications of these results for equity, efficiency, research, and policy.     

The Neolithic Transition in the Iberian Peninsula: Data Analysis and Modeling

We apply GIS techniques to analyze a carefully selected database of 93 Early Neolithic sites in the Iberian Peninsula. This allows us to study the spatial dynamics of the Neolithic transition in Iberia. We study how the Neolithic was introduced into the peninsula in order to test the hypothesis that the Neolithic was introduced almost simultaneously from two sources: one at the northeast (via the Mediterranean coast) and another one at the south (possibly from Northern Africa). We also analyze how the expansion of the Neolithic transition took place within the Iberian Peninsula and measure local rates of spread in order to identify regions with fast and slow rates (such as the slowdown at the Cantabrian coast). In addition, we attempt to reproduce the main results obtained from the GIS analysis by applying reaction–dispersal models to the expansion of the Neolithic transition in the Iberian Peninsula. We conclude that a model with two sources is a reasonable assumption that agrees better with the archaeological data available at present than a model with a single source.     

建立和完善我国住房金融体系及融资机制的战略选择

自我国住房制度改革以来,国家先后出台了一系列建立和完善住房金融体系,从而推动住宅产业发展、刺激经济增长的政策措施。目前住房金融体系和融资机制已初步形成,但尚存在融资中介体系不完善、住房信贷不合理、融资方式单调等一系列问题,从而制约了住宅业的发展。该在对上述问题进行分析的基础上,有针对性地提出了完善住房融资中介机构;完善住房抵押贷款制度;建立市场化和社会化住房保险机制;完善融资主体结构、融资工具和手段等一系列对策和建议。     

User-controlled Housing: Desirability and Feasibility

User-controlled housing is defined as a process in which the residents—not only professionals and developers—make significant decisions regarding the design and the construction or renovation of their homes. This paper argues that it is relevant to and should be commonly used in formal systems of housing in the developed countries. It draws support for its arguments from empirical evidence, primarily from Israel and the Netherlands. Much of the evidence is related to housing upgrading by moderate-income and middle-income households, which was found to be highly desirable from individual and public points of view. The paper recommends to decision-makers and planners to facilitate user-controlled housing and to make it an ordinary part of developing new neighbourhoods and renovating old ones.     

Some Critical and Methodological Aspects of Shoreline Determination: Examples from the Baltic Sea Region

Coastal shorelines worldwide are generally unstable and changing. The study of the precise relation between any archaeological site and the shoreline at the time when the site was used is therefore complicated, but still often not met with appropriate methodological approaches. In this article, we test models based on phosphate analysis and discuss how they can be used to detect ancient shorelines. We propose that a model of increased and oscillating phosphate values at the former water level is considered reliable and useful in areas with advancing shoreline.