"Determinants of football players' valuation: a systematic review" datasets

3 interdependent tables are available and are the materials used for a systematic review of the determinants of football players' valuation. 

- model_specifications is a table where each row represents one of the 111 model specifications included in the systematic review. Characteristics of the article from which specification was retrieved (title, year, authors, journal), attributes of the specification (sample size, population, econometric modeling, etc.), the significance levels of included variables, and the associated coefficients for significant variables. 

- model_specifications_dictionnary precise the names of the columns of the table model_specifications.

- variables_definitions_and_classification is a table that details all the 471 variables used in the 29 articles analysed with definitions quoted from articles when possible and presents a classification of these variables into 6 categories and several subcategories.

本次提供的3张相互关联的表格，为足球运动员身价决定因素系统综述的配套研究资料。

- 模型规格表（model_specifications）：该表格的每一行对应本次系统综述纳入的111项模型规格，记录了该规格来源文献的相关特征（含文献标题、发表年份、作者、刊载期刊）、模型规格自身属性（如样本量、研究总体、计量经济学建模方法等）、纳入变量的显著性水平，以及显著变量的对应系数。
- 模型规格表词典（model_specifications_dictionnary）：该表明确界定了model_specifications表格的各列名称。
- 变量定义与分类表（variables_definitions_and_classification）：该表格详细列明了本次分析的29篇文献中涉及的全部471个变量，尽可能直接引用原文给出变量定义，并将这些变量划分为6大类及若干子类别。