जब किसी वस्तु के लिए मांग की आय लोच (e y ) पूर्णतः धनात्मक (e y >0) होती है, तो यह किस प्रकार की वस्तु को दर्शाता है?

Giffen goods are special inferior goods for which:

What is the change in total utility due to the consumption of one additional unit of a commodity called?

The price of coffee increases due to a supply shock caused by bad weather. As a result, consumers purchase less coffee and substitute it with tea, which is cheaper. Which economic concept is being illustrated in this sce nario?