论动态垄断中研发组合的不稳定性，或：不能把两个鸡蛋放在一个篮子里

On the instability of the R&D portfolio in a dynamic monopoly. Or, one cannot get two eggs in one basket

• Luca Lambertini 通讯
• Raimondello Orsini
• Арсен Палестини