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In this article, the demand function for international phone calls from Iran to 47 countries that contained over 90 percent Iranian international phone calls was estimated by using pooling data model in three ways: general case, fixed effects and random effects. Then by using hausman test was determinated that unobserved terms are random effects.
In view of the research outcome, the demand elasticity of international phone calls in ratio of the price, volume trade and in-flows (calls) is -.93, .37 and .33 respectively which is indicative of low demand elasticity in respect of the said variables.
Accordingly , the demand elasticity of international phone calls in ratio of the income and internet users amount is 2.52 and 2.11 proving the high demand elasticity in respect of the said variables.
It is necessary to mention the time series data used in the research are contained 1379 to 1381.
JEL Classification: D21