1.   All this imposes a powerful constraint on language acquisition from the allegedly scanty data available to any child.

2.   Despite the limitations of the available data, the picture which emerges from this review is complex and interesting.

3.   Equally, science would be much less advanced than it is if the only available data were intuitive estimates of quantities.

4.   First, there is the establishment of goals in the light of available data and with the recognition of economic, political and administrative constraints.

5.   In looking at available official data we must bear these general limitations in mind.

6.   Inpart, the resolution of the paradox is almost certainly in terms of the accuracy of the available data.

7.   Publicly available data will be used rather than, at this stage, conducting interviews with business owners.