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SZLICHCIŃSKI, Krzysztof. Wagner’s law after more than century – increase or decrease of public expenditure stipulates economic growth?. Ekonomia i Prawo. Economics and Law. Online. 31 December 2009. Vol. 5, no. 1, pp. 75-84. [Accessed 16 July 2024]. DOI 10.12775/EiP.2009.005.