The Unassuming Economist

From a paper by Piotr Palac, and Justyna Tomala:

“The relationship between energy commodity prices and inflation has important implications for fiscal
policy and economic stability. The nature of energy commodities ismulti‑ d imensional, serving both as basic raw materials in production processes and as critical consumer goods. This study focuses on estimating the impact of oil, natural gas and coal prices on inflation in Poland. Through the adoption of multiple regression models using quarterly data from Q2 2000 to Q3 2023, the study aims to estimate the impact of energy commodity prices, particularly oil, coal, and natural gas, on inflation in Poland and to answer the research question: What role do energy commodity prices play in shaping inflation in Poland? The empirical analysis revealed that oil and coal prices significantly influence inflation, reflecting Poland’s energy dependency. Natural gas prices showed a limited impact due to lower consumption and mitigation policy measures. The significant impact of energy prices suggests that energy market developments should be closely monitored for their inflationary potential. The study offers valuable insights for policymakers in their efforts to effectively manage inflationary pressure. The article contributes to the literature by presenting the short‑ r un relationship between inflation and energy commodity prices, covering long period of time with both financial, COVID‑19 crisis and the Russian aggression in Ukraine.”

From a paper by Luccas Assis Attílio, and André Varella Mollick:

“We investigate the effects of oil price shocks on industrial and emerging market economies. We use a global vector autoregressive (GVAR) model with 19 economies from 1999M1 to 2022M3. Our sample evaluates output responses of each country to the same global shock, defined in several ways. While we find that domestic prices and interest rates in industrial economies respond to the WTI real oil price shock, the generalized impulse response functions (GIRF) tend to be not statistically significant in emerging economies. Stock markets increase in the first months for the oil producers but have negative values in the long-run. The oil price shock causes a generalized fall in industrial production and loses importance over time. We reinforce our results by identifying the oil shock using the structural GIRF (SGIRF) following a causal ordering from oil to real output. When we decompose WTI into either supply or demand shocks, industrial production declines in the short-run due to supply shocks but increases in response to oil demand shocks. Our results are very robust, especially in industrial economies when allowing for time-varying bilateral trade. Underscoring the importance of identifying oil price shocks, the oil price shock pushes inflation up, prompting the central bank’s response in policy rates.”

From a paper by Ruiqi Tan and Wei Dai:

“In this paper, we use monthly data from 1992 to 2022 and a structural VAR model to investigate the effects of oil supply shocks, aggregate demand shocks, and oil-specific demand shocks in the global crude oil market on the Canadian stock market. Our analysis reveals that these shocks affect the S&P/TSX Composite Index and various sector-specific indices in different ways. Specifically, the response of the Canadian market to oil-specific demand shocks diverges notably from the U.S. market, highlighting Canada’s unique position as an oil-exporting country. In the long run, oil price shocks account for over 10% of the variation in the composite index and as much as 35% in the Energy sector index.”

From a paper by Yiran Zhao, Xiangyun Gao, Huiling Zheng, Yupeng Zhang, Qingru Sun, Anjian Wang, and HaiZhong An:

“This study examines the impact of international crude oil prices on national sub-price indices following external shocks. It analyzes the heterogeneous transmission mechanisms of these shocks across diverse national price index networks. To achieve this, we employ Granger causality tests as the filter to construct impulse response networks. This approach helps unveil the duration, magnitude, and pathways of impact on sub-price indices in five countries: China, the US, Russia, Germany, and the UK. Our findings suggest that the impact of crude oil price changes on national sub-price indices is most pronounced within 1-2 months, and more persistent on the Producer Price Index (PPI) than the Consumer Price Index (CPI). Identifying specific sub-price indices affected by shocks shows that China and the US are more significantly impacted. Moreover, identifying the transmission paths of crude oil price changes within a country’s internal price system underscores the significance of the CPI of transportation. This study of price transmission within countries offers key insights for managing economic shocks at the microeconomic level.”

From a paper by Aviral Kumar Tiwari, Mehmet Metin Damm, Halil Altıntaş and Festus Victor Bekun:

“This paper uses the dynamic connectedness framework to investigate the interrelationship between the decomposed oil supply, demand and risk shocks that Ready (2018) developed and the stock market returns of emerging market economies. For this purpose, we use daily data from 11 October 2001 to 5 April 2021. Novel empirical methodologies, including wavelet quantile correlation (WQC), cross-quantilogram analysis, nonparametric causality-in-quantile approaches, contemporaneous R² connectedness approach and generalized R² connectedness approaches, are employed. The results show that oil price fluctuations significantly impact the economic performance of emerging market economies, reflecting historical events. Demand price shocks are regarded as net transmitters within the system, whereas supply and risk price shocks are net receivers of spillovers. Concurrently, our findings indicate a considerable degree of dynamic connectedness among the stock markets of emerging market economies. In particular, the stock markets of Brazil, Mexico, and Argentina have been identified as net transmitters of spillovers. In contrast, the stock markets of Turkey, South Korea, Malaysia, Indonesia and India are classified as net receivers of spillovers. Furthermore, we examine and document the advantages of diversified portfolios that include all sector indices, including oil price shocks and emerging market economy stock markets, in terms of portfolio performance. The insights offered here are valuable for investors and policymakers striving to enhance their strategic approaches in today’s interconnected global financial context. The results show that oil price fluctuations significantly impact the economic performance of emerging market economies and reflect historical events. Demand shocks affecting the stock market indices of Brazil, Argentina and Mexico tend to act as net spillover transmitters. In contrast, supply shocks affecting the stock market indices of Indonesia, South Korea, India, Turkey and Malaysia mainly act as net spillover receivers. Net pairwise interconnectedness analysis reveals that, except for crisis periods, interactions between financial markets or macroeconomic indicators are evenly distributed. Thus, systemic risk is lower, and markets act independently. Empirical findings obtained using WQC generally show the presence of negative correlations at long-time scales and low quantiles, which is considered an indicator of the safe-haven feature associated with the asset in question. The hedge feature is observed to be evident only at long time scales. The results of the cross-quantilogram analysis show mixed evidence of correlation in all stock indices, especially in the weekly lag structure, compared to daily and monthly lags. Finally, non-parametric Granger causality test results show that stock returns are insensitive to oil price fluctuations, making these markets attractive for investors seeking diversification strategies. These findings provide valuable recommendations for investors seeking sustainable equities in a volatile oil market.”