Perguntas com a marcação «econometrics»

8
Teste post hoc em uma ANOVA de design misto 2x3 usando SPSS?

Eu tenho dois grupos de 10 participantes que foram avaliados três vezes durante um experimento. Para testar as diferenças entre os grupos e nas três avaliações, executei um ANOVA de desenho misto 2x3 com group(controle, experimental), time(primeiro, segundo, três) e group x time. Ambos timee...

anova mixed-model spss post-hoc bonferroni time-series unevenly-spaced-time-series classification normal-distribution discriminant-analysis probability normal-distribution estimation sampling classification svm terminology pivot-table random-generation self-study estimation sampling estimation categorical-data maximum-likelihood excel least-squares instrumental-variables 2sls total-least-squares correlation self-study variance unbiased-estimator bayesian mixed-model ancova statistical-significance references p-value fishers-exact probability monte-carlo particle-filter logistic predictive-models modeling interaction survey hypothesis-testing multiple-regression regression variance data-transformation residuals minitab r time-series forecasting arima garch correlation estimation least-squares bias pca predictive-models genetics sem partial-least-squares nonparametric ordinal-data wilcoxon-mann-whitney bonferroni wilcoxon-signed-rank traminer regression econometrics standard-error robust misspecification r probability logistic generalized-linear-model r-squared effect-size gee ordered-logit bayesian classification svm kernel-trick nonlinear bayesian pca dimensionality-reduction eigenvalues probability distributions mathematical-statistics estimation nonparametric kernel-smoothing expected-value filter mse time-series correlation data-visualization clustering estimation predictive-models recommender-system sparse hypothesis-testing data-transformation parametric probability summations correlation pearson-r spearman-rho bayesian replicability dimensionality-reduction discriminant-analysis outliers weka
8
Regressão restrita em R: coeficientes positivos, soma a 1 e interceptação diferente de zero

Eu tenho o modelo que preciso estimar, com e .Y= π0 0+ π1X1+ π2X2+ π3X3+ ε ,Y=π0+π1X1+π2X2+π3X3+ε, Y = \pi_0 + \pi_1 X_1 + \pi_2 X_2 + \pi_3 X_3 + \varepsilon, π k ≥ 0  para  k ≥ 1∑kπk= 1  para  k ≥ 1∑kπk=1 for k≥1\sum_k \pi_k = 1 \text{ for }k \geq 1πk≥ 0  para  k ≥ 1πk≥0 for k≥1\pi_k\ge0 \text{...

r regression econometrics least-squares constrained-regression