Document Type : Research Paper

Authors

1 Accounting and economic dep. islamic azad university, yazd.iran

2 Department of Economic , Science and Research branch, Islamic Azad University, Tehran, Iran

Abstract

This study was an attempt to analyze the dynamic reaction of the exchange market pressure (EMP) to different states of the foreign exchange market and inflation in the Iranian economy during 1988:4-2017:4. To this end, the EMP index was calculated using Edwards’s (2002) and Kumah’s (2007) formulae. By considering inflation as the threshold variable and using Threshold Vector Autoregressive (TVAR) model, the results showed that lagged variables had no significant effects on EMP in a low inflation regime,  but inflation had significant effects on EMP in a high inflation regime. The results of using the Markov Switching Vector Autoregressive (MS-VAR) model showed that in EMP and INF equations, the autoregressive coefficients in all lags and in both regimes were significant; this emphasizes the stability of the estimated VAR model. Based on the results of the MS-VAR equations, the results of the Granger Causality Test showed that when the EMP switched to a high regime, the inflation would have a significant impact on the EMP, but in the regimes where the EMP was at a low level, the inflation was not the cause of the EMP. EMP in low inflation regimes could also affect inflation while EMP was not the cause of inflation in high inflation regimes. Therefore, the policymakers should note that increasing EMP, even in low inflation regimes, can lead to pressure on prices. On the other hand, an increase in the foreign reserves causes the EMP to switch to a high regime; then, the inflationary pressures at any level of the inflation rate can exacerbate the exchange market pressure, and policymakers would be unable to control the currency market. Thus, if the EMP is controlled, the effects of inflation on the EMP will be discontinued, and this is a key point for policymakers.

Keywords

Article Title [Persian]

پویایی فشار بازار ارز و تورم در ایران: رویکرد تغییر رژیم

Authors [Persian]

  • سید یحیی ابطحی 1
  • الهام امراللهی بیوکی 2

Abstract [Persian]

این مطالعه واکنش پویای فشار بازار ارز را به وضعیت‌های مختلف بازار ارز و تورم در اقتصاد ایران و طی دوره‌ی: 1396:04-1367:04 مورد تحلیل قرار می‌دهد. نتایج این مطالعه با در نظر گرفتن تورم به عنوان متغیر آستانه و با استفاده از مدل خودرگرسیون برداری آستانه‌ای (TVAR) نشان می‌دهد که در رژیم تورمی پایین متغیرهای باوقفه اثر معنی‌داری بر EMP ندارند اما در رژیم تورمی بالا، تورم اثر معنی‌داری برEMP دارد. همچنین، نتایج مطالعه با استفاده از مدل خودرگرسیون برداری چرخش مارکوف (MS-VAR) نشان می‌دهد که در معادلات تورم و EMP ضرایب خودرگرسیونی در تمام وقفه‌ها و در هر دو رژیم معنی‌دار هستند و این بر ثبات مدل برآورد شده تأکید می‌کند. نتایج آزمون علیت گرنجر بر پایه معادلات MS-VAR نشان می‌دهد زمانیکه EMP به رژیم بالا چرخش می‌کند تورم تأثیر معنی‌داری بر EMP دارد اما در رژیم‌هایی با سطح پایین EMP، تورم علت گرنجری EMP نخواهد بود. EMP در رژیم‌های تورمی پایین می‌تواند بر تورم اثرگذار باشد اگرچه EMP در رژیم‌های تورمی بالا علت گرنجری تورم نخواهد بود. بنابراین سیاستگذاران باید به این موضوع توجه کنند که افزایش EMP در رژیم‌های تورمی پایین نیز می‌تواند منجر به فشار بر قیمت‌ها شود.

Keywords [Persian]

  • فشار بازار ارز
  • پویایی تورمی
  • سیاست های پولی
  • مدل مارکوف
  • مدل آستانه
  • ایران
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