• An Animated Instructional Module for Teaching Production Economics with the Aid of 3-D Graphics

This paper pushes beyond past efforts in employing computer graphics in a number of ways. In this paper, the capabilities of the SAS for drawing surfaces and contours of three-dimensional functional forms are combined with the drawing, annotation and sequential animation features of Harvard Graphics in order to obtain animated sequences containing both three-dimensional production surfaces and two-dimensional contour maps. In essence, key features of the two software packages have been combined in order to obtain graphic images not possible with either of the two software packages alone and to generate animated sequences of graphics images that were previously impossible to do. Harvard Graphics also permits merger of two or more of the 3-D images generated by SAS into the same drawing (for example, a production surface and a price hyperplane) and therefore makes it possible to illustrate concepts such as ridge lines, pseudo-scale lines, and high-profit points using 2- and 3-D graphics.