At an Asian mobile service provider, the demand for voice calls has a price-elasticity of demand (PED) of -0.085 (or if we take the absolute value, PED = 0.085) and cross-price elasticity (CED) with respect to the price of short message service (SMS) of -0.078. The demand for SMS has a PED of -0.03 (or in absolute value, PED = 0.03) and CED with respect to the price of voice calls of -0.003.