Sentence examples for often difficult to evaluate from inspiring English sources

And as with other foreign policy tools, success is often difficult to evaluate.

The competing visions are often difficult to evaluate because the Republican candidates — Mr. Romney and his running mate, Paul Ryan — have become so artful about obfuscating their plans for Medicare, Medicaid and what they will do to reform the whole system.

The influence of vegetation on a river's sediment production, especially in mountainous areas, is often difficult to evaluate.

This problem is reinforced in plant populations for which it is often difficult to evaluate the limits of habitat patches.

The DRUJ is often difficult to evaluate in these injuries and to date there are no radiographic markers to predict instability after a radius fracture.

Remedial programmes are often difficult to evaluate because participation is usually based on pupil characteristics that are largely unobservable to the analyst.

Clinical congestion is often difficult to assess [ 33].

In young children, it is often very difficult to evaluate symptoms like headache, muscle ache or chilliness.

Lichen planus, in spite of having some common points with the previous one, is clearly distinct and often more difficult to evaluate.

Such health promotion interventions are often more difficult to evaluate in internally valid research designs and may therefore have more difficulties in being recognize at the established effectiveness level.

Founding CEOs often find it difficult to evaluate executives.