1.   Foreign competition provides consumers with a greater variety of goods and it forces domestic producers to be more efficient than otherwise.

2.   Gas cookers are more efficient than electric ones.

3.   Mission-driven organizations are more efficient than rule-driven organizations, for one.

4.   Private sector firms tend to be more efficient than public sector firms, provided both operate in Markets facing strong competition.

5.   The engine is more efficient than a conventional diesel engine.

6.   The old gangs proved more efficient than the newcomers.

7.   This anaerobic system is much less efficient than the primary, oxygen-using system.

8.   The new system is only marginally more efficient than the old one.

9.   Repeated extractions using small portions of solvent are more efficient than using a single but larger volume of solvent.

10.   These power stations are more efficient than conventional stations.