A collection of functions for conducting a meta-analysis with mean differences data.  It uses recommended procedures as	described in The 	Handbook of Research Synthesis and Meta-Analysis	(Cooper, Hedges, & Valentine, 2009).

Provides functions for diagnostic meta-analysis. Next to basic analysis and visualization the bivariate Model of Reitsma et al. (2005) that is equivalent to the HSROC of Rutter & Gatsonis (2001) can be fitted. A new approach based to diagnostic meta-analysis of Holling et al. (2012) is also available. Standard methods like summary, plot and so on are provided.

This is an open-source software designed specifically for text mining in the Persian language. It allows users to examine word frequencies, download data for analysis, and generate word clouds. This tool is particularly useful for researchers and analysts working with Persian language data.
    This package mainly makes use of the 'PersianStemmer' (Safshekan, R., et al. (2019). <https://CRAN.R-project.org/package=PersianStemmer>),
    'udpipe' (Wijffels, J., et al. (2023). <https://CRAN.R-project.org/package=udpipe>),
    and 'shiny' (Chang, W., et al. (2023). <https://CRAN.R-project.org/package=shiny>) packages.

Provides an extension to 'MadanText' for creating and analyzing co-occurrence networks in Persian text data.
             This package mainly makes use of the 'PersianStemmer' (Safshekan, R., et al. (2019). <https://CRAN.R-project.org/package=PersianStemmer>),
             'udpipe' (Wijffels, J., et al. (2023). <https://CRAN.R-project.org/package=udpipe>),
             and 'shiny' (Chang, W., et al. (2023). <https://CRAN.R-project.org/package=shiny>) packages.

Contains the Maddison Project 2018 database, which provides 
    estimates of GDP per capita for all countries in the world between AD 1 and
    2016. See <https://www.rug.nl/ggdc/historicaldevelopment/maddison/> for more information.

Relatively easy access is provided to 2023 version of the Maddison 
      project data downloaded 2025-08-28. This project collates all the 
      credible data on population and GDP for 169 countries, with some dating 
      back to the year 1 of the current era. One function makes it easy to find 
      the leaders for each year, allowing users to delete countries like OPEC 
      with narrow economies to focus on technology leaders. Another function 
      makes it easy to plot data for only selected countries or years. Another 
      function makes it relatively easy to obtain references to the original 
      sources, which must be cited per the copyright rules of the Maddison 
      Project for different uses of their data.