Jane Falkingham of Southampton University has noted that "We've actually got population projections wrong consistently over the last 50 years... we've underestimated the improvements in mortality... but also we've not been very good at spotting the trends in fertility."
南安普敦大学的 Jane Falkingham 指出:"在过去的50年里，我们实际上一直在错误地预测人口数量... ... 我们低估了死亡率的改善... ... 但我们也没有很好地发现生育率的趋势。