Nigerian innovation survey data, collected with NEPAD support, prepared with PEDL funding

The pooled cross-sectional dataset (1359 firms in total) available for download has some specific features: * The dataset includes data from wave 1 (2005-2007) and wave 2 (2008-2010) of the Nigerian innovation surveys. * The year variable identifies the different survey waves. Wave 1 was completed in 2008 and wave 2, in 2011. * The service variable sorts the observations broadly into manufacturing and services. * The id variable identifies each unique firm. Repeatedness was ignored because repeated cases are only about 2.5%. * As much as possible, variables have been matched across the two waves. * Due to coding changes and some inconsistencies in the survey instrument, a few variables could not be matched. * Any variable that could not be matched is retained in its original form. * Some of the variables have notes attached to them. The notes are consistent with what is in the accompanying codebook.xls * Item numbering on the questionnaire for the two waves are not consistent. Thus, rather than use question numbers for variable names – as is commonly done – intuitive variable names and labels (defined in detail in the accompanying codebook.xls) are used. * Definitions of main concepts can be found in the accompanying codebook.xls. * It is strongly recommended that users thoroughly familiarize themselves with the accompanying codebook as well as the questionnaires for each of the waves before applying the dataset. This is crucial especially because of the skip patterns. While everything was done to ensure that the skip patterns were all correctly established, there can be no guarantee of perfection. * It is also strongly recommended that users be familiar with the nature of innovation surveys as this will help in understanding how to treat the data for analysis. The Oslo Manual, which is freely available online, is a very useful resource. To have a feel of the sectoral distribution of the sample, type in Stata: tab service yea