多式联运经营人与参加多式联运的各区段承运人，可以就多式联运合同的各区段运输，另以合同约定相互之间的责任。但是，此项合同不得影响多式联运经营人对全程运输所承担的责任。
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This interpretation is flawed. Regardless of time unit, no observations have patent=0, so extensive margin effects cannot be estimated. Moreover, at shorter intervals, coauthors constitute a larger proportion of cluster size, and patents per coauthor are mechanically tied to coauthor counts, introducing a mechanical negative bias.
Associated Press journalist Matt O'Brien contributed reporting.