احسان نمازی زاده

Numerous studies have been conducted to explore the relationship between unemployment, inflation expectations, exchange rates, and inflation. However, the connection among these factors remains ambiguous, especially in the context of Iran's economy, where the macroeconomic structure and geopolitical situation significantly heighten its importance. In this research, the dynamics of the New Keynesian Phillips Curve, considering the exchange rate, are analyzed over the period from Q1 2000 to Q4 2022 on a seasonal frequency using a Multivariate Continuous Wavelet Transform (MCWT) model across different frequencies (short-term, medium-term, and long-term). According to the findings of this study, the structure of the Phillips Curve does not align with the realities of Iran's economy. Even during periods of economic recession and expansion, a significant relationship between inflation and unemployment is sometimes absent, even in the short term. However, inflation is primarily influenced by inflation expectations and, to a lesser extent, by the exchange rate in the medium and long term. This indicates that if expectations and exchange rates are not managed, they could lead to persistent long-term inflation. Furthermore, due to price stickiness, even with successful management of exchange rates and expectations, a significant reduction in prices may remain elusive.

Industrial metals, particularly copper, zinc, lead, and nickel, play a pivotal role not only in determining the pricing of manufactured goods but also in ensuring the economic security of nations. Analyzing the return interconnections of these metals under varying market conditions is crucial. This study employs the Time-Varying Parameter Vector Autoregression (TVP-VAR) model over January 1990 to May 2024 to examine the price fluctuations of these metals, which are essential inputs for Shahid Bahonar Copper Industries. The results indicate that zinc and lead are the primary risk transmitters in normal and bullish markets, whereas in bearish markets, zinc acts as the main transmitter and nickel as the primary receiver of volatility. Additionally, significant asymmetries in volatility transmission are observed between these metals during bullish and bearish conditions, with more pronounced effects during events such as the 2008 financial crisis (for copper and zinc) and the Russia-Ukraine war (for zinc and lead). This research offers practical insights for industry managers, enabling them to determine optimal timing for purchasing raw materials and selling products based on the co-movement or divergence of metal prices. The proposed strategies focus on minimizing costs, providing a comprehensive framework for managing volatility in metal markets.