In Section 3, we analyze the case ofindirect government control, i.e., state subsidization of privately owned media. We endoge-nize government control in Section 4, asking when the government would choose to take overprivately owned media. Section 5 extends the model to multiple media outlets.
Small Angle Gradient Echo Methods. The gradient echo technique is generally used in combination with an RF excitation pulse that has a small flip angle of less than 90Ë. We will discover that the advantage of this is that it permits the use of shorter TR values and this, in turn, produces faster image acquisition.
Gradient Echo Questions. 1  How does a gradient echo differ from a spin echo? 2  How do you produce multiple GRE's from a single pulse? 3  There are so many different GRE sequences. Can you make sense of these?  It seems as if every manufacturer has adopted a different name for their gradient echo sequences. Why is this?