scholarly journals Modifiable Areal Unit Problem (MAUP): Analysis of Agriculture of the State of Paraná-Brazil

2021 ◽  
Vol 13 (2) ◽  
pp. 35-50
Author(s):  
Elizabeth Giron Cima ◽  
eimar Freire da Rocha-Junior ◽  
Miguel Angel Uribe-Opazo ◽  
Gustavo Henrique Dalposso
Keyword(s):  
Social Development ◽  
Spatial Data ◽  
Agricultural Production ◽  
Research Data ◽  
The State ◽  
Modifiable Areal Unit Problem ◽  
Grain Production ◽  
Areal Unit ◽  
Regional Centers ◽  
Socioeconomic Data

The way the researcher groups his research data will influence the result of his work. In the literature, this phenomenon is treated as a Problem of the Modifiable Areal Unit. The objective of this article was to analyze the three spatial levels by Municipalities, Regional Centers and Mesoregions using the following data: gross domestic product, effective agricultural production, grain production and gross value of agricultural production for the state of Paraná-Brazil in the period since 2012 until 2015. The methodological procedure studied data from the Paranaense Institute for Economic and Social Development of the above-named variables collected on the website of the Paranaense Institute for Economic and Social Development of the 399 municipalities, 23 regional centers and 10 mesoregions. The results found show the presence of the Modifiable Areal Unit Problem, presenting different results for each level of grouping. The study revealed the problem of the modifiable areal unit is a relevant occurrence and it should be disregarded by researchers who work with clusters of spatial data in their studies. The results found allow a better understanding of the scale effect and demonstrate the efficiency of spatial analysis in socioeconomic data.

scholarly journals Capacity of grain storage and outflow in the State of Paraná

2020 ◽  
Vol 13 (7) ◽  
pp. 16
Author(s):  
P. H. P. C. Muniz ◽  
I. C. Custódio ◽  
H. A. Fidelis ◽  
N. M. Moura ◽  
J. R. C. Oliveira Filho ◽  
...  
Keyword(s):  
Agricultural Production ◽  
Storage Capacity ◽  
The State ◽  
Grain Storage ◽  
Grain Production ◽  
North Central ◽  
The North ◽  
Production Growth ◽  
Logistics Process

Grain storage basically consists of collections of regional or national productions in order to store the production for a specific period, with specific objectives such as waiting for a more affordable price or preventing the attack of pests, fungi or even moisture gain , with the aim of preserving the quality of the grains. To guarantee the quality of these grains, factors such as storage and transportation are fundamental within the logistics process of agricultural production. Paraná participates directly in the agricultural economic development, so data were collected based on a survey on grain production in the state of Paraná in the databases of the Instituto Brasileiro de Geografia e Estatística, Companhia Nacional de Abastecimento e Cadastro Nacional de Unidades de Abastecimento. In this way, the objective of this article is to make an analysis about the current static storage capacity of grains in the state of Paraná. In the year 2019, the static storage capacity is 29,789,778 thousand tons, showing a deficit of 7,310,222 thousand tons of grain. As for the distribution of the warehouses, it is observed that the mesoregions of the West of Paraná and of the North Central, assume the leadership of regions with greater static capacity of the state of Paraná. Thus, it can be concluded that the static storage capacity of the state of Paraná does not accompany the production growth, presenting a deficit of 24.53% in the static storage capacity of grains in the 2018/2019 harvest.

scholarly journals Disparities in Spatial Prevalence of Feline Retroviruses due to Data Aggregation: A Case of the Modifiable Areal Unit Problem

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Bimal K. Chhetri ◽  
Olaf Berke ◽  
David L. Pearl ◽  
Dorothee Bienzle
Keyword(s):  
Risk Factors ◽  
Spatial Scale ◽  
Spatial Data ◽  
Spatial Clustering ◽  
Postal Code ◽  
Modifiable Areal Unit Problem ◽  
Areal Unit ◽  
Scan Test ◽  
Study Results ◽  
Spatial Scan

The knowledge of the spatial distribution feline immunodeficiency virus and feline leukemia virus infections, which are untreatable, can inform on their risk factors and high-risk areas to enhance control. However, when spatial analysis involves aggregated spatial data, results may be influenced by the spatial scale of aggregation, an effect known as the modifiable areal unit problem (MAUP). In this study, area level risk factors for both infections in 28,914 cats tested with ELISA were investigated by multivariable spatial Poisson regression models along with MAUP effect on spatial clustering and cluster detection (for postal codes, counties, and states) by Moran’s I test and spatial scan test, respectively. The study results indicate that the significance and magnitude of the association of risk factors with both infections varied with aggregation scale. Further more, Moran’s I test only identified spatial clustering at postal code and county levels of aggregation. Similarly, the spatial scan test indicated that the number, size, and location of clusters varied over aggregation scales. In conclusion, the association between infection and area was influenced by the choice of spatial scale and indicates the importance of study design and data analysis with respect to specific research questions.

scholarly journals DEFICIT IN STATIC GRAIN STORAGE CAPACITY IN THE STATE OF GOIÁS IN THE 2016/17 HARVEST

2020 ◽  
Vol 7 (1) ◽  
pp. 70-76
Author(s):  
Mariana Pina Da Silva Berti ◽  
André Felippe Monteiro Guimaraes ◽  
Natalia Arruda ◽  
Christian Luis Ferreira Berti
Keyword(s):  
Agricultural Production ◽  
Storage Capacity ◽  
International Markets ◽  
The State ◽  
Grain Production ◽  
Safe Storage ◽  
West Region ◽  
Large Production ◽  
Made In

The Central-West region has been highlighted as the largest agricultural center in the country, accounting for 42% of national grain production. Goiás State represented an amount of 18.9 million tons in the last harvest. Despite the large production, a problem which affects the negotiations and the quality of the harvested grains is storage. A static capacity of 20% higher than grain production is recommended. The objective of this work was to evaluate the storage capacity of grains in the State of Goiás and their respective mesoregions using a comparison with the agricultural production of the Center-West region. The deficit in the static storage capacity of grain in Goiás for the 2016/17 harvest was 25.17% in relation to grain production, since the recommended amount for safe storage is 20% higher than production, which indicates the need for a 45.17% increase in the State’s static storage capacity to supply the demand for products throughout the year and to support the producers so that they can be competitive in the domestic and international markets in the commodity negotiations. Public policies to support the creation and expansion of storage are necessary, since the investment made in the structures is high and the return of spending is not immediate.

scholarly journals Modifiable Areal Unit Problem: the issue of determining the relationship between microparameters and a macroparameter

2019 ◽  
Vol 10 (3) ◽  
pp. 393-417
Author(s):  
Michał Barnard Pietrzak
Keyword(s):  
Spatial Data ◽  
Value Added ◽  
Homogeneous System ◽  
Economic Research ◽  
Technical Equipment ◽  
Modifiable Areal Unit Problem ◽  
Entire Area ◽  
Areal Unit ◽  
The Impact ◽  
The Relationship

Research background: One of the issues considered by economists such as Tinbergen (1939), Klein (1946), May, (1946), Theil (1965), Pawłowski (1969), Bołt et al. (1985) was to determine the mechanism of transition between the results of microeconomics and the theory of macroeconomics. As part of this research, Pawłowski (1969) raised the problem of establishing the relationship between microparameters and a macroparameter. In the presented article, Pawłowski's problem was expanded to include spatial economic research, where micro-dependencies and spatial macro-dependencies were analysed. Purpose of the article: The purpose of the article is to establish the relationship between the microparameters set for SGM agricultural macroregions and the macroparameter referring to the whole area of Poland, where the parameters describe the economic dependencies regarding the impact of the size of farms in established region on their technical equipment. In the study, the economic relationships analysed in the case of individual SGM agricultural macroregions were defined as spatial micro-dependencies, and in the case of the entire area of Poland as spatial macro-dependencies. Methods: The methodological part of the article describes the concepts of Modifiable Areal Unit Problem, causal homogeneity of spatial data, homogeneous system of sets of areal units, area and sub-areas of conclusions. The concepts of micro-dependencies and spatial macro-dependencies are presented. Basic equations allowing to determine the evaluation of the spatial macroparameter as a linear combination of spatial microparameters were also presented. Findings & Value added: In the first stage of the study, spatial micro-dependencies were identified for subsequent SGM agricultural macroregions. In the second stage of the study, the relationship between spatial microparameters for single macroregions and the spatial macroparameter for Poland was determined. Establishing the relationship allowed to determine the macroparameter estimate for the whole area of Poland.

Effects of the Modifiable Areal Unit Problem on the Delineation of Traffic Analysis Zones

2009 ◽  
Vol 36 (4) ◽  
pp. 625-643 ◽  
Author(s):  
José Manuel Viegas ◽  
L Miguel Martinez ◽  
Elisabete A Silva
Keyword(s):  
Spatial Analysis ◽  
Spatial Data ◽  
Transportation Planning ◽  
Traffic Analysis ◽  
Modifiable Areal Unit Problem ◽  
Areal Unit ◽  
Transportation Demand ◽  
Planning Models ◽  
Demand Models ◽  
And Performance

Transportation analysis is typically thought of as one kind of spatial analysis. A major point of departure in understanding problems in transportation analysis is the recognition that spatial analysis has some limitations associated with the discretization of space. Among them, modifiable areal units and boundary problems are directly or indirectly related to transportation planning and analysis through the design of traffic analysis zones (TAZs). The modifiable boundary and the scale issues should all be given specific attention during the specification of a TAZ because of the effects these factors exert on statistical and mathematical properties of spatial patterns (ie the modifiable areal unit problem—MAUP). The results obtained from the study of spatial data are not independent of the scale, and the aggregation effects are implicit in the choice of zonal boundaries. The delineation of zonal boundaries of TAZs has a direct impact on the reality and accuracy of the results obtained from transportation forecasting models. In this paper the MAUP effects on the TAZ definition and the transportation demand models are measured and analyzed using different grids (in size and in origin location). This analysis was developed by building an application integrated in commercial GIS software and by using a case study (Lisbon Metropolitan Area) to test its implementabiity and performance. The results reveal the conflict between statistical and geographic precision, and their relationship with the loss of information in the traffic assignment step of the transportation planning models.

Are Regional Differences in Psychological Characteristics and Their Correlates Robust? Applying Spatial-Analysis Techniques to Examine Regional Variation in Personality

2021 ◽  
pp. 174569162199832
Author(s):  
Tobias Ebert ◽  
Jochen. E. Gebauer ◽  
Thomas Brenner ◽  
Wiebke Bleidorn ◽  
Samuel D. Gosling ◽  
...  
Keyword(s):  
Spatial Data ◽  
The United States ◽  
Psychological Characteristics ◽  
Big Five Personality ◽  
Modifiable Areal Unit Problem ◽  
Areal Unit ◽  
Analysis Techniques ◽  
Personality Differences ◽  
Psychological Differences ◽  
Spatial Dependencies

There is growing evidence that psychological characteristics are spatially clustered across geographic regions and that regionally aggregated psychological characteristics are related to important outcomes. However, much of the evidence comes from research that relied on methods that are theoretically ill-suited for working with spatial data. The validity and generalizability of this work are thus unclear. Here we address two main challenges of working with spatial data (i.e., modifiable areal unit problem and spatial dependencies) and evaluate data-analysis techniques designed to tackle those challenges. To illustrate these issues, we investigate the robustness of regional Big Five personality differences and their correlates within the United States (Study 1; N = 3,387,303) and Germany (Study 2; N = 110,029). First, we display regional personality differences using a spatial smoothing approach. Second, we account for the modifiable areal unit problem by examining the correlates of regional personality scores across multiple spatial levels. Third, we account for spatial dependencies using spatial regression models. Our results suggest that regional psychological differences are robust and can reliably be studied across countries and spatial levels. The results also show that ignoring the methodological challenges of spatial data can have serious consequences for research concerned with regional psychological differences.

scholarly journals Modelling the impact of MAUP on environmental drivers for Schistosoma japonicum prevalence

2020 ◽  
Author(s):  
Andrea Araujo Navas ◽  
Frank Osei ◽  
Ricardo J. Soares Magalhães ◽  
Lydia R. Leonardo ◽  
Alfred Stein
Keyword(s):  
Risk Factors ◽  
Data Structure ◽  
Schistosoma Japonicum ◽  
Spatial Data ◽  
Environmental Drivers ◽  
Parameter Estimates ◽  
Modifiable Areal Unit Problem ◽  
Areal Unit ◽  
Reliable Parameter ◽  
Spatial Support

Abstract Background: The modifiable areal unit problem (MAUP) arises when the support size of a spatial variable affects the relationship between prevalence and environmental risk factors. Its effect on schistosomiasis modelling studies could lead to unreliable parameter estimates. The present research aims to quantify MAUP effects on environmental drivers of Schistosoma japonicum infection by (i) bringing all covariates to the same spatial support, (ii) estimating individual-level regression parameters at 30 m, 90 m, 250 m, 500 m, and 1 km spatial supports, and (iii) quantifying the differences between parameter estimates using five models. Methods: We modelled the prevalence of Schistosoma japonicum using sub-provinces health outcome data and pixel-level environmental data. We estimated and compared regression coefficients from convolution models using Bayesian statistics. Results: Increasing the spatial support to 500 m gradually increased the parameter estimates and their associated uncertainties. Abrupt changes in the parameter estimates occur at 1 km spatial support, resulting in loss of significance of almost all the covariates. No significant differences were found between the predicted values and their uncertainties from the five models. We provide suggestions to define an appropriate spatial data structure for modelling that gives more reliable parameter estimates and a clear relationship between risk factors and the disease. Conclusions: Inclusion of quantified MAUP effects was important in this study on schistosomiasis. This will support helminth control programs by providing reliable parameter estimates at the same spatial support, and suggesting the use of an adequate spatial data structure, to generate reliable maps that could guide efficient mass drug administration campaigns. Keywords: schistosomiasis modelling; modifiable areal unit problem; uncertainty; Bayesian statistics; convolution model.

On the diversity of the effects of the state support for agriculture

2019 ◽  
pp. 59-73 ◽  
Author(s):  
Nikolai M. Svetlov ◽  
Renata G. Yanbykh ◽  
Dariya A. Loginova
Keyword(s):  
Agricultural Production ◽  
The State ◽  
Russian Regions ◽  
Negative Effects ◽  
State Support ◽  
Soft Budget Constraints ◽  
Institutional Conditions ◽  
Positive Effects ◽  
Production Factors ◽  
Corporate Farms

In this paper, we assess the effects of agricultural state support of corporate farms on their revenues from agricultural production sales in 14 Russian regions that differ in technology, environment and institutional conditions. In addition to the direct effect of the state support, the indirect effects via labor and capital are revealed. For this purpose, we identify production functions and statistical models of production factors for each of these regions separately. We find out diverse effects of the state support on revenues among the regions. Positive effects prevail. Negative effects are mainly caused by labor reductions that follow subsidy inflows. Another cause of negative effects is the soft budget constraints phenomenon.

Историософия русского сознания в творческом консерватизме Л.А. Тихомирова. Об упущенных возможностях национально-государственного развития России в начале ХХ века

2020 ◽  
Vol 102 ◽  
pp. 613-620
Author(s):  
Igor N. Tyapin
Keyword(s):  
Social Development ◽  
Social Organization ◽  
The State ◽  
Russian History ◽  
National Consciousness ◽  
State And Society ◽  
Working Out

The author of the article uses the works of L.A. Tikhomirov as the basis when examining the problem of criticism of the conditions of the state and society in monarchic Russia during the last decade of its existence from the part of the conservative figures who not only advocated the necessity to preserve the autocracy but also substantially contributed to the working out of the main principles of Russian social development. In particular, the “creative conservators” managed to accomplish the deep philosophic conceptualization of Russian history while trying to find the previously lost ideal of social organization. Tikhomirov’s relevant concepts of the mutual conditionality of Russian national consciousness underdevelopment and state degradation, as well as of the necessity to realize the model of the moral state of justice on the basis of the national idea, were not accepted by the bureaucratic system that resulted before long in the collapse of Russian monarchic state.

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