Question: What are the reference categories for the nominal variables in the table and were the regression model's assumptions for obtaining the outputs met?

Table 4 Multilevel Estimation on Corruption (Combined Results from Multiple Imputation of Missing Values from 10 Datasets) Model 0 Model 1 country random effect Model 0 + individual factors Coef. SE Ivalue Coef. SE tvalue Intercept 2.543 0.139 18.32\" 1.130 0.181 6.26\"\" Formal institutions Index 1: perception of nancial institutions 0.187 0.025 7.37M Index 2: perception of legal institutions 0.104 0.017 6.21\"\" Time for red tape 0.100 0.022 4.62\"\" Legal alternatives to bribe 0.110 0.018 5.97\"\" Informal institutions Business ethics 1: competitor's unfair play 0.086 0.029 2.96\"\" Business ethics 1: shadow economy 0.091 0.013 7.03\"\" Social networks: investments from familyifriends 0.189 0.086 219* Firm characteristics (control variables) Firm ownership: private 0.289 0.067 4.34\" Firm size: small enterprises 0.071 0.105 0.68 Firm size: medium enterprises 0.074 0.095 0.78 Firm industry 1: construction 0.251 0.091 2.75** Firm industry 2: manufacturing 0.025 0.063 0.40 Variance Components 02 Individual level 2.156 0.060 35.7W 1.803 0.050 35.75\"\" 02 Country level 0.366 0.122 3.0M 0.224 0.077 2.92\" Number of observations (Level 1, Level 2) 2576, 20 2576, 20 Notes: Statistical signicances at ** p