Environmental Studies; public expenditure; economic growth; Wagner’s law; Keynesian hypothesis; Granger causality; cointegration; error correction model; autoregressive distributed lag model; Logarithms; Macroeconomics; Error correction; Neutrality; Fiscal policy; Causality; Sustainability; Dynamic tests; Medical supplies; Consumption; Public sector; Wages & salaries; COVID-19; Public services; Hypotheses; Capital expenditures; Economic analysis; Gross Domestic Product--GDP; Autoregressive models; Coronaviruses; Government spending; Economic development; Time series; Government; Peru