Early Muslin economists, including Ibn Taymiyyah, understood supply and demand.  The first modern use of the term was by James Denham-Steuart in 1767.
        
        
     
    
 replied to:  amorze
         
        
            
            Replied to:  Early Muslin economists, including Ibn Taymiyyah, understood supply and demand....
         
        Adam Smith used the phrase in his seminal work, The Wealth of Nations.
        
        
     
    
 replied to:  bonnieginter
         
        
            
            Replied to:  Adam Smith used the phrase in his seminal work, The Wealth...
         
        Marginalism emerged in the late nineteenth century.