Spatial and temporal autocorrelations affect Taylor's law for US county populations: Descriptive and predictive models

Meng, Xu; Cohen, Joel E.

doi:10.1371/journal.pone.0245062

Cited by 10 publications

(8 citation statements)

References 36 publications

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“…The mechanism through which TPL comes out is still deliberately talked over or argued in the literature (Campos-Herrera et al, 2013;Xiao et al, 2015;Xu and Cohen, 2021). On the other hand, TPL usage is confirmed to be compatible with orders of many organisms and applicable to their distribution patterns in nature (Taylor, 2019).…”

Section: Using Basic Mathematical Models In Nematologymentioning

confidence: 99%

Spatial Distribution of Nematodes to Improve their Sampling and Management Decision

Abd-Elgawad

2023

PJN

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Sound sampling of nematodes is basic to their related research and management. Several models of nematodes have been applied to characterize their possible spatial and temporal distribution patterns. These models can provide several advantages such as determining sample size optimization and nematode transformation counts necessary to meet assumptions for parametric statistical analysis. Basically, they can help in unraveling the complexities of ecosystem dynamics into quantifiable metrics. Yet, their merits and demerits, discussed herein, should be considered by researchers and stakeholders. As they should be tailored to fit the intended goal of application, related modifications to derive more accurate and appropriate conclusions for nematode management are reviewed in this study. For instance, iteration improved sample size of Meliodogyne incognita to be 389 instead of 402 using the same assumptions of sampling accuracy and nematode density in both cases. Also, alternative analyses to help decision-maker in affording proper nematode-management schemes are suggested. Although single models have been used in nematode studies, it is better to apply more than one model in a study to complement each other and demonstrate more facets of their distributions.

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Section: Using Basic Mathematical Models In Nematologymentioning

confidence: 99%

Spatial Distribution of Nematodes to Improve their Sampling and Management Decision

Abd-Elgawad

2023

PJN

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“…In China, Taylor's goal model is the most widely used and influential evaluation model and still dominates today, i.e., evaluating course based on the ultimate degree of achievement of classroom goals. However, an evaluation model limited to objectives alone no longer meets the needs of process-oriented and competency-based course evaluation (Xu & Cohen, 2021;Berz, 1997). The CIPP model was proposed by Stufflebeam and his colleagues in 1983 and includes four evaluation stages: context evaluation, input evaluation, process evaluation, and product evaluation.…”

Section: Literature Reviewmentioning

confidence: 99%

The Establishment of Career Development and Employment Guidance Course Evaluation System based on CIPP Model

Shu,

Yanbin,

et al. 2023

J TECHNOL HUM

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The establishment of an evaluation system that is suitable for career development and employment guidance courses in colleges and universities is of great significance to effectively improve college students' professional literacy and employability, improve the quality of practical teaching, and improve the deficiencies in courses construction. In the process of constructing a career development and employment guidance course teaching evaluation system, the principles of science, orientation and relevance should be followed. This research introduces the CIPP evaluation model into the evaluation system construction of career development and employment guidance courses in universities, combines the CIPP evaluation concept and theoretical content with the teaching of college career development and employment guidance courses, and focuses on context evaluation, input evaluation, process evaluation, product evaluation considers the index content of college career development and employment guidance evaluation system. In the evaluation process, we attach great importance to a diverse evaluation process and strive to build a lifelong evaluation system.

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“…These data have demonstrated, under varying socioeconomic contexts, that territorial statistics provide a truly refined and complete key to the interpretation of mechanisms of socioeconomic development (Rozenfeld et al 2008). In this regard, social sciences have increasingly benefited from big data and non-linear approaches to complexity based on the continuous development of new econometric techniques (Xu and Cohen 2021).…”

Section: Introductionmentioning

confidence: 99%

Testing Taylor’s Law in Urban Population Dynamics Worldwide with Simultaneous Equation Models

2023

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Knowledge of long-term population trends is still incomplete at the global scale. In this perspective, human and animal ecology has intensively studied the relationship between the Mean (M) size and the Variance (V) of specific attributes of subpopulations within a given regional system. One of the best-known relationships between these two attributes suitable to describe long-term population trends is governed by Taylor’s law (TL). The present article contributes to the recent literature on population trends worldwide by testing the long-term relationship (1950–2015) between the overall variance and mean in the total population of 1857 metropolitan agglomerations in 155 countries classified into 9 world macro-regions. To estimate the unknown parameter(s) of the V–M relation we made use of a simultaneous equation system using both linear (classical TL) and quadratic specifications, with the aim of ascertaining a wide range of simplified (or more complex) association rules between the two dimensions of demographic change. The empirical results show that TL is verified in all nine cases, although a quadratic relationship provides slightly better results than the classical, linear relationship. More specifically, similar estimates for both linear and quadratic relationships were characteristic of ‘new’ demographic continents with more recent and intense urbanization processes (the Americas, and African and Asian countries). The predominance of quadratic relationships characterized regions with long-established urbanization processes, such as Europe, Russia, and, partly, China and the Middle East. The relevance of the TL for a refined understanding of urbanization mechanisms worldwide, and the importance of a quadratic term for distinguishing metropolitan systems that have experienced different development paths, were finally discussed.

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Spatial and temporal autocorrelations affect Taylor's law for US county populations: Descriptive and predictive models

Cited by 10 publications

References 36 publications

Spatial Distribution of Nematodes to Improve their Sampling and Management Decision

Spatial Distribution of Nematodes to Improve their Sampling and Management Decision

The Establishment of Career Development and Employment Guidance Course Evaluation System based on CIPP Model

Testing Taylor’s Law in Urban Population Dynamics Worldwide with Simultaneous Equation Models

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