Figure 7.

Schematic of identifiability conditions for the (a) MTD and (b) mLTD with $d=3$ and $m_1=m_2=m_3=3$. Identifiability for MTD requires a zero entry in each row of ${\mathbf{Z}}^j$; for mLTD, the first column and last row must all be zero. In MTD, the columns of each ${\mathbf{Z}}^j$ must sum to the same value and must sum to one across all ${\mathbf{Z}}^j$. Abbreviations: mLTD, multinomial logistic transition distribution; MTD, mixture transition distribution. Figure adapted with permission from Tank et al. (2021b).