具有影响力的国会议员、包括即将成为新的特朗普政府国务卿的参议员，正在敦促取消美国给予中国的永久正常贸易关系(PNTR)地位。

(ECNS) --“We are very close with the Chinese. Even though there is a distance between Ethiopia and China, we feel that China is our close neighbor and neighboring country,” said Ethiopian scholar Mela ...

相关研究结果 以 Identification of alarm pheromone components of the southern giant Asian hornet,Vespa soror,a major pest of honey ...

H2N2流感病毒引起了1957年“亚洲流感”，造成至少200万人死亡，并在大流行后转为季节性流感病毒，但1968年后，该病毒逐渐从人群中消失，但其跨种传播及造成大流行的机制至今尚未清晰阐明。近日，毕玉海团队和高福院士团队合作，发现了H2N2大流行病毒 ...

（北大经院）杨汝岱、田巍、刘政文、吴群锋 This paper introduces strategic interactions into a Ricardian model where two countries optimize trade policies. In a Nash Equilibrium, we find that optimal import tariffs are zer ...