Narrow MWD alpha-olefin copolymers

In a polymerization process for producing copolymer in the form of copolymer chains, from a reaction mixture comprised of catalyst, ethylene, and at least one other alpha-olefin monomer, the improvement which comprises conducting the polymerization:

• (a) in at least one mix-free reactor,
• (b) with essentially one active catalyst species,
• (c) using at least one reaction mixture which is essentially transfer agent-free, and
• (d) in such a manner and under conditions sufficient to initiate propagation of essentially all of said copolymer chains simultaneously, wherein the copolymer chains are dispersed within the reaction mixture.