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. By taking annual data of the telecom industry from 2012 to 2020 in the USA, unbalanced cross-sectional data (panel data …) comprising 421 firm-year observations for 72 firms were studied using pooled panel regression, univariate analysis, correlation …
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like Spiegel and Spulber [1997, RAND Journal of Economics] highlight that effect. The present paper considers a panel data …) and gross investment (INV) in physical capital. The evidence accruing from a dynamic panel data estimation indicates an … ; dynamic panel data …
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