Hi!
On the issue of Han coins, it must emphasise that not until the Tang dynasty that China fully used money for exchange. However, taxes in Han would be very different from Rome, as labour and regular military training were required. The Han army, therefore, were largely included universal consciption.
On the issue of population, chinese records provided more quantitable elements than Western counterparts. I do not remember the registered households in High Han (Wudi), was about 53 million, without counting jimifuzhou (minor ethinics who did not register.)
There is still, however, something I do not satisfy with the paper, primarily on living standard of both Empires. I do not know for certain the Roman living standard under, let say, Augustine's reign, but there exists several estimations for Han done by economic Chinese historian Wu Hui.
Anyhow, my purpose for this thread is simply provide a site for Roman economics.