Changes of leadership have a great effect on the international political economy.

His suggestion was, effectively, an order.

It would be difficult to improve the device without an effective catalyst.

This sort of structure is called a double negative, but in effect it shows affirmation.

As yardsticks to measure the effectiveness of information retrieval there exist those called 'recall ratio' and 'precision ratio'.

She received the letter to the effect that he would soon be back.

He made a statement to that effect.

The decision had a ripple effect throughout the company, causing changes in various departments.

When our class performed a play, I took charge of stage effects.

The medication may have some side effects.