专利权定价的实物期权方法

通过实物期权定价理论，研究了专利权价值，并用实物期权定价公式给出了专利权的价值评估公式。     

Effect of British hunting ban on fox numbers

Pressure to ban the hunting of foxes with hounds in Britain has fuelled debate about its contribution to the control of fox populations. We took advantage of a nationwide one-year ban on fox-hunting during the outbreak of foot-and-mouth disease (FMD) in 2001 to examine this issue and found that the ban had no measurable impact on fox numbers in randomly selected areas. Our results argue against suggestions that fox populations would increase markedly in the event of a permanent ban on hunting.