An Investigation of the Parameters Affecting Affordable Housing Location Choice †

: The provision of affordable housing has become a major concern for policymakers and urban planners, especially in developing nations of the world. One of the key challenges in this domain is the identiﬁcation of suitable locations for the development of affordable housing. Appropriate locations of affordable housing will improve the housing satisfaction of residents by increasing the social and economic beneﬁts for low-income residents, providing better accessibility to opportunities and services, and reducing the poverty concentration. A bidirectional relationship exists among affordable adequate housing and health, and has been recognised as an essential sustainable development component. Therefore, this research aims to identify the factors that govern the spatial location choice of affordable housing. The determinants were derived via an exploratory study of relevant literature studies encompassing different geographical contexts, socio-economic backgrounds, and technological and economic advancement levels. A total of 61 parameters were identiﬁed, each of which lies in one of the following six categories: neighbourhood characteristics, urban characteristics, social factors, economic parameters, demographic factors, and housing quality. The ﬁndings indicate that the location choice of users varies with regard to the context of an urban area. Broadly speaking, most of the prior studies have considered accessibility, transport-related factors, and housing prices as important attributes in determining the optimal location for siting affordable housing. However, parameters such as socio-economic criteria, accessibility to various facilities, and employment opportunities have greater signiﬁcance in developing nations. Contrasting results are observed in the case of several developed nations, wherein factors such as safety, environmental aspects, and dwelling type were emphasised over elements of accessibility. The identiﬁed parameters can be considered by the policymakers to evaluate optimal locations for siting affordable housing projects, thereby ensuring that low-income residents reside in neighbourhoods that promote social and economic sustainability


Introduction
As the global population continues to burgeon and urbanisation accelerates, the challenge of ensuring adequate and affordable housing for all has become imperative, especially in developing nations.One of the key challenges in this domain is the identification of suitable locations for the development of affordable housing.Appropriate locations of affordable housing will improve the housing satisfaction of residents by increasing the social and economic benefits for low-income residents, providing better accessibility to opportunities and services, reducing poverty concentration, and positively impacting health conditions [1,2].The housing location choice not only defines the interaction between the built environment and the households but also influences their lifestyle and travel patterns [3].To gain insights into housing demand and spatial allocation issues, it is imperative to delve into users' housing preferences, as it is a fundamental factor in addressing the mismatch between housing supply and household needs.It has been acknowledged by experts and researchers that the placement of affordable housing at optimal sites is critical in determining its viability and effectiveness [4].Therefore, this research aims to identify the factors that govern the spatial location choice of affordable housing.By examining a diverse array of factors, both individual and contextual, we aim to contribute to a more comprehensive understanding of the dynamics governing these choices.In doing so, we hope to offer insights that can inform policy development, urban planning strategies, and affordable housing provision practices to create more equitable and sustainable urban environments.

Methodology
This research employs an exploratory literature review of peer-reviewed journal articles and conference proceedings.It focuses on investigating specific keywords, namely residential location choice, affordable housing, location suitability, and parameters, across various electronic databases such as Google Scholar, Scopus, ScienceDirect, and Springer-Link.A manual assessment of the titles and abstracts of articles was carried out to decide their inclusion in the study.Altogether, 48 research papers from peer-reviewed journals and 3 conference proceedings articles were identified as relevant to the aim of this research.Through these sources, 61 parameters associated with the housing location choice of the residents were gathered.Among these, 45% were carried out in developing countries, notably China, Malaysia, and India, while the remaining were from high-income and technologically advanced nations, including the United States of America and the United Kingdom.

Parameters Identified via Literature Review
The housing choice of a household is described as the selection of a dwelling unit or its spatial setting from a range of alternatives with various characteristics based on considerations involving their needs, preferences, and available resources along with existing housing market constraints [5,6].However, there exists a notable absence of a standardised method for categorising the attributes utilised for defining residential location choices.Addressing this drawback, a structured classification of parameters influencing the location choices of households is developed in this study, comprising the following six distinct categories, namely neighbourhood characteristics, urban characteristics, social factors, economic parameters, demographic factors, and housing quality (Table 1).

1.
Neighbourhood Characteristics: The notion of neighbourhood may be characterised as a collection of spatially related features, including a diverse array of attributes, such as infrastructure, accessibility and proximity to various facilities, environmental conditions, and transportation network traits or connectivity [7,8].

2.
Urban Characteristics: The term urban characteristic is a location-related attribute that is defined by the geometries and dimensions of physical objects.It involves the function of population size and density, the spatial extent of the built area, the variations in land prices across the area, and a mix of different land uses [9].

3.
Social Factors: Social characteristics comprise a wide range of societal and cultural attributes (such as ethnic groups and social status), demographic, and interpersonal attributes that shape the identity, behavior, and relationships of individuals within a group or community [10].4.
Economic Parameters: Apart from social factors, economic aspects have gained greater prominence in influencing urban land use patterns.Economic value has been a critical factor in the allocation of land resources, influencing the overall affordability of a housing project [11,12].Price of land and construction and labour market attributes are some specific economic parameters that are mostly included in studies of residential location choice set.

5.
Demographic Factors: Demography deals with the study of human populations and facilitates in determining the response of various demographic groups to housing location choice factors [4].Variables such as ethnic diversity and the household size average at the zonal level are often associated with spatial alternatives of location choices.6.
Housing Quality: Though housing quality encompasses multidimensional indicators, the factors representing the distinctive physical characteristics of a dwelling unit, along with other measures of building services such as water supply, waste management, and drainage systems, have been incorporated into studies assessing the location choice of households.

Comparative Analysis of Parameters in Developing and Developed Countries
The parameters related to measures of accessibility and proximity to various facilities were incorporated into the largest share of the articles reviewed (59%), highlighting its importance in influencing choice behavior.Apart from this, transportation-related factors, connectivity, and the distribution of employment zones are prioritized in the housing location decisions particularly by lower-income communities [19,20].High-density areas tend to attract residents due to the presence of abundant job opportunities and wellestablished infrastructure [17].Social factors such as education and income level, economic sector of employment, and housing ownership type influence housing choices [2].After a comparison of the results, it can be stated that the parameters related to connectivity are found to be less important in developed nations as they have better public transport infrastructure coverage.Dwelling type and other dwelling unit features, building services, and environmental factors hold higher weights in most developed countries, notably the USA.Distinct preferences towards housing typology are observed depending on the household type, such as single-family or joint family, and family size.The findings also suggest that clustering tendencies are evident in relation to ethnic composition and housing costs, mostly among high-income economies [18].In the context of the infrastructural level, evidence suggests that inner city locations are preferred over suburbs in developing nations due to the presence of different infrastructure services and better access to employment in informal sectors [15].The subcategory of attributes that were encompassed in the reviewed research papers is represented in Figure 1.

Conclusions
In this study, multiple attributes associated with the location choice of residents in the context of affordable housing have been examined through a review of relevant literature.Location choice can be envisioned as the decision-making process of households linked to probabilities of selection from a range of parameters correlated with a specific location that influences their everyday activities.The findings indicate that the location choice of users varies concerning the context of an urban area.The result of this study can be implied in housing development policy, land use, and transportation planning.The identified factors may be prioritized and considered by policymakers to evaluate optimal locations for siting affordable housing projects as these align with the actual demand and preferences of end users, thereby addressing the housing needs of the residents.It will also ensure that low-income residents reside in neighbourhoods that promote social and economic sustainability.

Conclusions
In this study, multiple attributes associated with the location choice of residents in the context of affordable housing have been examined through a review of relevant literature.Location choice can be envisioned as the decision-making process of households linked to probabilities of selection from a range of parameters correlated with a specific location that influences their everyday activities.The findings indicate that the location choice of users varies concerning the context of an urban area.The result of this study can be implied in housing development policy, land use, and transportation planning.The identified factors may be prioritized and considered by policymakers to evaluate optimal locations for siting affordable housing projects as these align with the actual demand and preferences of end users, thereby addressing the housing needs of the residents.It will also ensure that low-income residents reside in neighbourhoods that promote social and economic sustainability.

Figure 1 .
Figure 1.Occurrence of parameters in percentage in the literature reviewed (source: generated by authors).

Figure 1 .
Figure 1.Occurrence of parameters in percentage in the literature reviewed (source: generated by authors).

Table 1 .
List of parameters identified from literature review, source-compiled by authors.