[^ README](/guide-inequalities/r/)
Lower Moment Inequality Function
m_fun_lower(
theta,
d_matrix,
a_subset,
j0_vector,
v_bar,
z_matrix = 1,
dist_subset = NULL
)
theta
a vector containing the parameters of interest.
d_matrix
an n x j0 matrix of product portfolio in each market.
a_subset
an n x j0 matrix of estimated revenue differential in each market.
j0_vector
a j0 x 2 matrix of ownership by the two firms.
v_bar
a tuning parameter as in Assumption 4.2.
z_matrix
an optional n x j0 matrix of instruments in each market.
dist_subset
an optional n x j0 matrix of distance between products in each market.
a j0-dimensional vector of lower moment inequalities.