In a paper on pioneering advantages, the authors estimated a two stage least squares model . MS=f( PQ, PLB, P, PION, PION=AD) PQ=f(PION, MS, DC, AD) PLB=f(DC, PION, R&D) MS =market share PQ =product quality PLB =product line breadth P =price AD =Advertising dollars DC =direct costs R&D =research and development PION =whether the firm is a pioneer (=1) or not (=0) They found the following results Mean MS t-values PQ t-values PLB t-values Intercept 26.77 0.74 171.70 2.12 5.46 2.28 PQ 24.32 0.14 2.41 PLB 2.05 13.00 5.52 P 104.20 -0.25 -1.94 PION 0.40 1.56 2.56 2.99 1.61 0.62 4.31 PION*AD 40 0.024 3.03 DC 101.50 2.59 3.12 -0.05 -2.13 AD 100 2.13 2.25 R&D 6.74 0.27 3.44 MS 1.08 2.89 R2 0.53 0.36 0.27Consider the entire system of equations. a. What is the effect of PION on market share? b. Compute the price elasticity on market share