Regional Disparities in Inflation Persistence: Unpacking the Dynamics of Price Growth in Portugal
DOI:
https://doi.org/10.58567/eal02030006Keywords:
Inflation Persistence, Regional analysis, Time series data , Autoregressive Integrated Moving Average (Arima) ModelAbstract
This paper investigates the degree of inflation persistence across regions in Portugal by analyzing the Consumer Price Index (CPI) growth rates for NUTS II regions. The study employs the Augmented Dickey-Fuller (ADF) test to determine whether the CPI data for Portugal is stationary or non-stationary. The results of the ADF test reveal that the IPC data for Portugal is non-stationary, indicating that inflation exhibits persistence in the long run. The study further assesses the persistence of inflation by estimating an autoregressive integrated moving average (ARIMA) model for each region. The Ljung-Box test is used to test for autocorrelation in the time series data, and the Hurst exponent is calculated to evaluate the presence of long-term memory in the time series data. The study finds that there is significant autocorrelation in the time series data for all regions, supporting the presence of persistence in inflation at the regional level in Portugal. The Hurst exponent also shows that the time series data for each region exhibits a high degree of persistence in inflation. Finally, the study applies the ARIMA model to each CPI division's data and uses the Ljung-Box test to test for autocorrelation in the time series data. The results show that some CPI divisions exhibited higher levels of persistence compared to others. For example, the "Housing, water, electricity, gas and other fuels" division exhibited high persistence, while the "Communication" division exhibited low persistence. This study contributes to the existing literature by exploring regional inflation persistence in Portugal and its implications for policymaking. The results provide insights into the inflation persistence patterns across regional levels in Portugal, by emphasizing the need to consider regional differences in inflation dynamics when formulating effective policy interventions. Understanding the persistence of inflation is crucial for policymakers to ensure price stability and sustainable economic growth.
References
Ahsan, I. (2023). Minimum Wage and Sectoral Price Inflation. Available at SSRN 4452506. http://dx.doi.org/10.2139/ssrn.4452506
Benigno, P., Canofari, P., Di Bartolomeo, G., & Messori, M. (2023). Inflation dynamics and monetary policy in the euro area. Luiss School of European Political Economy. https://doi.org/10.1093/qje/qjad027
Bianchi, F., Faccini, R., & Melosi, L. (2023). A Fiscal Theory of Persistent Inflation. The Quarterly Journal of Economics, qjad027.
Capistrán, C., & Ramos‐Francia, M. (2009). Inflation Dynamics in Latin America. Contemporary Economic Policy, 27(3), 349-362. https://doi.org/10.1111/j.1465-7287.2008.00128.x
Chiquiar, D., Noriega, A. E., & Ramos-Francia, M. (2010). A time-series approach to test a change in inflation persistence: the Mexican experience. Applied Economics, 42(24), 3067-3075. https://doi.org/10.1080/00036840801982684
Choi, C. Y., & Matsubara, K. (2007). Heterogeneity in the persistence of relative prices: What do the Japanese cities tell us?. Journal of the Japanese and International Economies, 21(2), 260-286. https://doi.org/10.1016/j.jjie.2006.03.002
Ciccarelli, M., Osbat, C., Bobeica, E., Jardet, C., Jarocinski, M., Mendicino, C., ... & Stevens, A. (2017). Low inflation in the euro area: Causes and consequences. ECB occasional paper, (181). http://dx.doi.org/10.2139/ssrn.2910978
De Bruin, W. B., Van der Klaauw, W., Topa, G., Downs, J. S., Fischhoff, B., & Armantier, O. (2012). The effect of question wording on consumers’ reported inflation expectations. Journal of Economic Psychology, 33(4), 749-757. https://doi.org/10.1016/j.joep.2012.02.001
DiCecio, R., & Nelson, E. (2007). An estimated DSGE model for the United Kingdom. Available at SSRN 966310. http://dx.doi.org/10.2139/ssrn.966310
Dladla, P., & Malikane, C. (2022). Inflation dynamics in an emerging market: The case of South Africa. Economic Analysis and Policy, 73, 262-271. https://doi.org/10.1016/j.eap.2021.11.016
El Omari, S., & Benlagha, N. (2023). Accounting for inflation dynamic in a fully optimizing macroeconomic framework: evidence from the US states. Applied Economics, 1-17. https://doi.org/10.1080/00036846.2023.2169240
Fan, Y. (2022). Demand shocks and price stickiness in housing market dynamics. Economic Modelling, 110, 105820. https://doi.org/10.1016/j.econmod.2022.105820
Giavazzi, F., & Spaventa, L. (2011). Why the current account may matter in a monetary union: lessons from the financial crisis in the euro area. The Euro area and the financial crisis, 199. https://repec.unibocconi.it/igier/igi/wp/2011/426.pdf
Quelhas, J., & Serra, S. (2023). The inflation process in Portugal: the role of price spillovers. Banco de Portugal Economic Studies
Stock, J. H., & Watson, M. W. (2016). Core inflation and trend inflation. Review of Economics and Statistics, 98(4), 770-784. https://doi.org/10.1162/REST_a_00608
Vyrostková, L., & Mirdala, R. (2022). Inflation persistence and unit root tests in the euro area countries. http://hdl.handle.net/11025/50705
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