Supply, Demand & Curve was an Irish progressive rock group from Dublin active during the 70's consisting of musicians like composer Roger Doyle (featured in the likes of electronic groups like Fovea Hex), Brian Masterson, Jolyon Jackson, Paddy Finney, Greg Boland (of Moving Hearts),Paul McAteer, Fran Breen and Rosemarie Taylor. The group started out under the name Jazz Therapy and lasted until 1977 with only one released album which musically shares some of the jazz and folk sensibilities with the more accessible progressive rock bands in the Canterbury scene.